diff --git a/src/main/java/appeng/client/render/blocks/RenderBlockAssembler.java b/src/main/java/appeng/client/render/blocks/RenderBlockAssembler.java
index b6527dcd..4e523806 100644
--- a/src/main/java/appeng/client/render/blocks/RenderBlockAssembler.java
+++ b/src/main/java/appeng/client/render/blocks/RenderBlockAssembler.java
@@ -102,10 +102,9 @@ public class RenderBlockAssembler extends BaseBlockRender<BlockMolecularAssemble
 	}
 
 	@Override
-	public boolean renderInWorld( BlockMolecularAssembler block, IBlockAccess world, BlockPos pos, ModelGenerator renderer )
+	public boolean renderInWorld( BlockMolecularAssembler maBlock, IBlockAccess world, BlockPos pos, ModelGenerator renderer )
 	{
-		BlockMolecularAssembler blk = block;
-		TileMolecularAssembler tma = blk.getTileEntity( world, pos );
+		TileMolecularAssembler tma = maBlock.getTileEntity( world, pos );
 
 		if ( renderer.isAlphaPass() )
 		{
@@ -115,12 +114,12 @@ public class RenderBlockAssembler extends BaseBlockRender<BlockMolecularAssemble
 				TaughtIcon lights = new TaughtIcon( ExtraBlockTextures.BlockMolecularAssemblerLights.getIcon(), -2.0f );
 				renderer.setColorRGBA_F( 1, 1, 1, 0.3f );
 				renderer.setBrightness( 14 << 20 | 14 << 4 );
-				renderer.renderFaceXNeg( blk, pos, lights );
-				renderer.renderFaceXPos( blk, pos, lights );
-				renderer.renderFaceYNeg( blk, pos, lights );
-				renderer.renderFaceYPos( blk, pos, lights );
-				renderer.renderFaceZNeg( blk, pos, lights );
-				renderer.renderFaceZPos( blk, pos, lights );
+				renderer.renderFaceXNeg( maBlock, pos, lights );
+				renderer.renderFaceXPos( maBlock, pos, lights );
+				renderer.renderFaceYNeg( maBlock, pos, lights );
+				renderer.renderFaceYPos( maBlock, pos, lights );
+				renderer.renderFaceZNeg( maBlock, pos, lights );
+				renderer.renderFaceZPos( maBlock, pos, lights );
 				return true;
 			}
 			return false;
@@ -130,9 +129,9 @@ public class RenderBlockAssembler extends BaseBlockRender<BlockMolecularAssemble
 		//renderer = BusRenderer.INSTANCE.renderer;
 		BusRenderer.INSTANCE.renderer=renderer;
 		
-		this.preRenderInWorld( block, world, pos, renderer );
+		this.preRenderInWorld( maBlock, world, pos, renderer );
 
-		IOrientable te = this.getOrientable( block, world, pos );
+		IOrientable te = this.getOrientable( maBlock, world, pos );
 
 		EnumFacing fdy = te.getUp();
 		EnumFacing fdz = te.getForward();
@@ -140,52 +139,52 @@ public class RenderBlockAssembler extends BaseBlockRender<BlockMolecularAssemble
 
 		renderer.renderAllFaces = true;
 
-		this.renderCableAt( 0.11D, world, pos, block, renderer, 0.141D, false );
-		this.renderCableAt( 0.188D, world, pos, block, renderer, 0.1875D, true );
+		this.renderCableAt( 0.11D, world, pos, maBlock, renderer, 0.141D, false );
+		this.renderCableAt( 0.188D, world, pos, maBlock, renderer, 0.1875D, true );
 
-		blk.getRendererInstance().setTemporaryRenderIcon(  renderer.getIcon( world.getBlockState( pos ) )[0] );
+		maBlock.getRendererInstance().setTemporaryRenderIcon(  renderer.getIcon( world.getBlockState( pos ) )[0] );
 
 		this.renderBlockBounds( renderer, 2, 14, 0, 14, 16, 2, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 0, 14, 2, 2, 16, 14, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 2, 0, 14, 14, 2, 16, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 14, 0, 2, 16, 2, 14, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		// sides...
 		this.renderBlockBounds( renderer, 0, 0, 0, 16, 2, 2, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 0, 2, 0, 2, 16, 2, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 0, 0, 2, 2, 2, 16, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 0, 14, 14, 16, 16, 16, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 14, 0, 14, 16, 14, 16, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 14, 14, 0, 16, 16, 14, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 14, 2, 0, 16, 14, 2, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 0, 2, 14, 2, 14, 16, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
 		this.renderBlockBounds( renderer, 1, 1, 1, 15, 15, 15, fdx, fdy, fdz );
-		renderer.renderStandardBlock( blk, pos );
+		renderer.renderStandardBlock( maBlock, pos );
 
-		blk.getRendererInstance().setTemporaryRenderIcon( null );
+		maBlock.getRendererInstance().setTemporaryRenderIcon( null );
 
 		renderer.renderAllFaces = false;
 
diff --git a/src/main/java/appeng/client/render/blocks/RenderBlockCharger.java b/src/main/java/appeng/client/render/blocks/RenderBlockCharger.java
index 260451cd..b4deffaf 100644
--- a/src/main/java/appeng/client/render/blocks/RenderBlockCharger.java
+++ b/src/main/java/appeng/client/render/blocks/RenderBlockCharger.java
@@ -87,8 +87,6 @@ public class RenderBlockCharger extends BaseBlockRender<BlockCharger, TileCharge
 	{
 		this.preRenderInWorld( block, world, pos, renderer );
 
-		final BlockCharger blk = block;
-
 		final IOrientable te = this.getOrientable( block, world, pos );
 
 		final EnumFacing fdy = te.getUp();
@@ -97,28 +95,28 @@ public class RenderBlockCharger extends BaseBlockRender<BlockCharger, TileCharge
 
 		renderer.renderAllFaces = true;
 		this.renderBlockBounds( renderer, 6, 1, 0, 10, 15, 2, fdx, fdy, fdz );
-		boolean out = renderer.renderStandardBlock( blk, pos );
+		boolean out = renderer.renderStandardBlock( block, pos );
 
-		blk.getRendererInstance().setTemporaryRenderIcons( ExtraBlockTextures.BlockChargerInside.getIcon(), null, null, null, null, null );
+		block.getRendererInstance().setTemporaryRenderIcons( ExtraBlockTextures.BlockChargerInside.getIcon(), null, null, null, null, null );
 
 		this.renderBlockBounds( renderer, 2, 0, 2, 14, 3, 14, fdx, fdy, fdz );
-		out = renderer.renderStandardBlock( blk, pos );
+		out = renderer.renderStandardBlock( block, pos );
 
 		this.renderBlockBounds( renderer, 3, 3, 3, 13, 4, 13, fdx, fdy, fdz );
-		out = renderer.renderStandardBlock( blk, pos );
+		out = renderer.renderStandardBlock( block, pos );
 
-		blk.getRendererInstance().setTemporaryRenderIcon( null );
+		block.getRendererInstance().setTemporaryRenderIcon( null );
 
-		blk.getRendererInstance().setTemporaryRenderIcons( null, ExtraBlockTextures.BlockChargerInside.getIcon(), null, null, null, null );
+		block.getRendererInstance().setTemporaryRenderIcons( null, ExtraBlockTextures.BlockChargerInside.getIcon(), null, null, null, null );
 
 		this.renderBlockBounds( renderer, 2, 13, 2, 14, 16, 14, fdx, fdy, fdz );
-		out = renderer.renderStandardBlock( blk, pos );
+		out = renderer.renderStandardBlock( block, pos );
 
 		this.renderBlockBounds( renderer, 3, 12, 3, 13, 13, 13, fdx, fdy, fdz );
-		out = renderer.renderStandardBlock( blk, pos );
+		out = renderer.renderStandardBlock( block, pos );
 
 		renderer.renderAllFaces = false;
-		blk.getRendererInstance().setTemporaryRenderIcon( null );
+		block.getRendererInstance().setTemporaryRenderIcon( null );
 
 		this.postRenderInWorld( renderer );
 		return out;
@@ -127,11 +125,7 @@ public class RenderBlockCharger extends BaseBlockRender<BlockCharger, TileCharge
 	@Override
 	public void renderTile( BlockCharger block, TileCharger tile, WorldRenderer tess, double x, double y, double z, float f, ModelGenerator renderer )
 	{
-		ItemStack sis = null;
-		if( tile instanceof IInventory )
-		{
-			sis = ( (IInventory) tile ).getStackInSlot( 0 );
-		}
+		final ItemStack sis = tile.getStackInSlot( 0 );
 
 		if( sis != null )
 		{
diff --git a/src/main/java/appeng/client/render/blocks/RenderBlockCraftingCPUMonitor.java b/src/main/java/appeng/client/render/blocks/RenderBlockCraftingCPUMonitor.java
index c4d669e9..a63f0151 100644
--- a/src/main/java/appeng/client/render/blocks/RenderBlockCraftingCPUMonitor.java
+++ b/src/main/java/appeng/client/render/blocks/RenderBlockCraftingCPUMonitor.java
@@ -59,15 +59,14 @@ public class RenderBlockCraftingCPUMonitor extends RenderBlockCraftingCPU<BlockC
 	@Override
 	public void renderTile( BlockCraftingMonitor block, TileCraftingMonitorTile tile, WorldRenderer tess, double x, double y, double z, float f, ModelGenerator renderer )
 	{
-		if( tile instanceof TileCraftingMonitorTile )
+		if( tile != null )
 		{
-			TileCraftingMonitorTile cmt = tile;
-			IAEItemStack ais = cmt.getJobProgress();
+			final IAEItemStack ais = tile.getJobProgress();
 
-			if( cmt.dspList == null )
+			if( tile.dspList == null )
 			{
-				cmt.updateList = true;
-				cmt.dspList = GLAllocation.generateDisplayLists( 1 );
+				tile.updateList = true;
+				tile.dspList = GLAllocation.generateDisplayLists( 1 );
 			}
 
 			if( ais != null )
@@ -75,16 +74,16 @@ public class RenderBlockCraftingCPUMonitor extends RenderBlockCraftingCPU<BlockC
 				GL11.glPushMatrix();
 				GL11.glTranslated( x + 0.5, y + 0.5, z + 0.5 );
 
-				if( cmt.updateList )
+				if( tile.updateList )
 				{
-					cmt.updateList = false;
-					GL11.glNewList( cmt.dspList, GL11.GL_COMPILE_AND_EXECUTE );
-					this.tesrRenderScreen( tess, cmt, ais );
+					tile.updateList = false;
+					GL11.glNewList( tile.dspList, GL11.GL_COMPILE_AND_EXECUTE );
+					this.tesrRenderScreen( tess, tile, ais );
 					GL11.glEndList();
 				}
 				else
 				{
-					GL11.glCallList( cmt.dspList );
+					GL11.glCallList( tile.dspList );
 				}
 
 				GL11.glPopMatrix();
diff --git a/src/main/java/appeng/client/render/blocks/RenderBlockCrank.java b/src/main/java/appeng/client/render/blocks/RenderBlockCrank.java
index 7e413968..8f8e59b4 100644
--- a/src/main/java/appeng/client/render/blocks/RenderBlockCrank.java
+++ b/src/main/java/appeng/client/render/blocks/RenderBlockCrank.java
@@ -69,8 +69,7 @@ public class RenderBlockCrank extends BaseBlockRender<BlockCrank, TileCrank>
 	@Override
 	public void renderTile( BlockCrank blk, TileCrank tile, WorldRenderer tess, double x, double y, double z, float f, ModelGenerator renderBlocks )
 	{
-		TileCrank tc = tile;
-		if( tc.getUp() == null || tc.getUp() == null )
+		if( tile.getUp() == null )
 		{
 			return;
 		}
@@ -91,7 +90,7 @@ public class RenderBlockCrank extends BaseBlockRender<BlockCrank, TileCrank>
 		this.applyTESRRotation( x, y, z, tile.getForward(), tile.getUp() );
 
 		GL11.glTranslated( 0.5, 0, 0.5 );
-		GL11.glRotatef( tc.visibleRotation, 0, 1, 0 );
+		GL11.glRotatef( tile.visibleRotation, 0, 1, 0 );
 		GL11.glScalef( -1, 1, 1 );
 		GL11.glTranslated( -0.5, 0, -0.5 );
 
diff --git a/src/main/java/appeng/client/render/blocks/RenderBlockInscriber.java b/src/main/java/appeng/client/render/blocks/RenderBlockInscriber.java
index dff3e2b4..b08fa652 100644
--- a/src/main/java/appeng/client/render/blocks/RenderBlockInscriber.java
+++ b/src/main/java/appeng/client/render/blocks/RenderBlockInscriber.java
@@ -109,8 +109,6 @@ public class RenderBlockInscriber extends BaseBlockRender<BlockInscriber, TileIn
 	{
 		this.preRenderInWorld( block, world, pos, renderer );
 
-		final BlockInscriber blk = block;
-
 		final IOrientable te = this.getOrientable( block, world, pos );
 		if( te == null )
 		{
@@ -125,25 +123,25 @@ public class RenderBlockInscriber extends BaseBlockRender<BlockInscriber, TileIn
 
 		// sides...
 		this.renderBlockBounds( renderer, 3, 1, 0, 13, 15, 3, fdx, fdy, fdz );
-		boolean out = renderer.renderStandardBlock( blk, pos );
+		boolean out = renderer.renderStandardBlock( block, pos );
 
 		this.renderBlockBounds( renderer, 0, 1, 0, 3, 15, 16, fdx, fdy, fdz );
-		out = renderer.renderStandardBlock( blk, pos );
+		out = renderer.renderStandardBlock( block, pos );
 
 		this.renderBlockBounds( renderer, 13, 1, 0, 16, 15, 16, fdx, fdy, fdz );
-		out = renderer.renderStandardBlock( blk, pos );
+		out = renderer.renderStandardBlock( block, pos );
 
 		// top bottom..
 		this.renderBlockBounds( renderer, 1, 0, 1, 15, 4, 15, fdx, fdy, fdz );
-		out = renderer.renderStandardBlock( blk, pos );
+		out = renderer.renderStandardBlock( block, pos );
 
 		this.renderBlockBounds( renderer, 1, 12, 1, 15, 16, 15, fdx, fdy, fdz );
-		out = renderer.renderStandardBlock( blk, pos );
+		out = renderer.renderStandardBlock( block, pos );
 
-		blk.getRendererInstance().setTemporaryRenderIcon( null );
+		block.getRendererInstance().setTemporaryRenderIcon( null );
 
 		renderer.renderAllFaces = false;
-		blk.getRendererInstance().setTemporaryRenderIcon( null );
+		block.getRendererInstance().setTemporaryRenderIcon( null );
 
 		this.postRenderInWorld( renderer );
 		return out;
@@ -152,8 +150,6 @@ public class RenderBlockInscriber extends BaseBlockRender<BlockInscriber, TileIn
 	@Override
 	public void renderTile( BlockInscriber block, TileInscriber tile, WorldRenderer tess, double x, double y, double z, float f, ModelGenerator renderer )
 	{
-		TileInscriber inv = tile;
-
 		GL11.glPushMatrix();
 		this.applyTESRRotation( x, y, z, tile.getForward(), tile.getUp() );
 
@@ -162,7 +158,7 @@ public class RenderBlockInscriber extends BaseBlockRender<BlockInscriber, TileIn
 		GL11.glDisable( GL12.GL_RESCALE_NORMAL );
 		GL11.glCullFace( GL11.GL_FRONT );
 
-		Minecraft mc = Minecraft.getMinecraft();
+		final Minecraft mc = Minecraft.getMinecraft();
 		mc.renderEngine.bindTexture( TextureMap.locationBlocksTexture );
 
 		// << 20 | light << 4;
@@ -172,37 +168,34 @@ public class RenderBlockInscriber extends BaseBlockRender<BlockInscriber, TileIn
 
 		OpenGlHelper.setLightmapTextureCoords( OpenGlHelper.lightmapTexUnit, var11, var12 );
 
-		final float TwoPx = 2.0f / 16.0f;
-		float middle = 0.5f;
-
-		float press = 0.2f;
-		final float base = 0.4f;
-
 		long absoluteProgress = 0;
 
-		if( inv.smash )
+		if( tile.smash )
 		{
-			long currentTime = System.currentTimeMillis();
-			absoluteProgress = currentTime - inv.clientStart;
+			final long currentTime = System.currentTimeMillis();
+			absoluteProgress = currentTime - tile.clientStart;
 			if( absoluteProgress > 800 )
 			{
-				inv.smash = false;
+				tile.smash = false;
 			}
 		}
 
-		float relativeProgress = absoluteProgress % 800 / 400.0f;
+		final float relativeProgress = absoluteProgress % 800 / 400.0f;
 		float progress = relativeProgress;
 
 		if( progress > 1.0f )
 		{
 			progress = 1.0f - ( progress - 1.0f );
 		}
+		float press = 0.2f;
 		press -= progress / 5.0f;
 
 		IAESprite ic = ExtraBlockTextures.BlockInscriberInside.getIcon();
 		tess.startDrawingQuads();
 
+		float middle = 0.5f;
 		middle += 0.02f;
+		final float TwoPx = 2.0f / 16.0f;
 		tess.addVertexWithUV( TwoPx, middle + press, TwoPx, ic.getInterpolatedU( 2 ), ic.getInterpolatedV( 2 ) );
 		tess.addVertexWithUV( 1.0 - TwoPx, middle + press, TwoPx, ic.getInterpolatedU( 14 ), ic.getInterpolatedV( 2 ) );
 		tess.addVertexWithUV( 1.0 - TwoPx, middle + press, 1.0 - TwoPx, ic.getInterpolatedU( 14 ), ic.getInterpolatedV( 13 ) );
@@ -210,6 +203,7 @@ public class RenderBlockInscriber extends BaseBlockRender<BlockInscriber, TileIn
 
 		tess.addVertexWithUV( TwoPx, middle + press, 1.0 - TwoPx, ic.getInterpolatedU( 2 ), ic.getInterpolatedV( 3 ) );
 		tess.addVertexWithUV( 1.0 - TwoPx, middle + press, 1.0 - TwoPx, ic.getInterpolatedU( 14 ), ic.getInterpolatedV( 3 ) );
+		final float base = 0.4f;
 		tess.addVertexWithUV( 1.0 - TwoPx, middle + base, 1.0 - TwoPx, ic.getInterpolatedU( 14 ), ic.getInterpolatedV( 3 - 16 * ( press - base ) ) );
 		tess.addVertexWithUV( TwoPx, middle + base, 1.0 - TwoPx, ic.getInterpolatedU( 2 ), ic.getInterpolatedV( 3 - 16 * ( press - base ) ) );
 
@@ -232,26 +226,26 @@ public class RenderBlockInscriber extends BaseBlockRender<BlockInscriber, TileIn
 		GL11.glPopMatrix();
 
 		int items = 0;
-		if( inv.getStackInSlot( 0 ) != null )
+		if( tile.getStackInSlot( 0 ) != null )
 		{
 			items++;
 		}
-		if( inv.getStackInSlot( 1 ) != null )
+		if( tile.getStackInSlot( 1 ) != null )
 		{
 			items++;
 		}
-		if( inv.getStackInSlot( 2 ) != null )
+		if( tile.getStackInSlot( 2 ) != null )
 		{
 			items++;
 		}
 
 		if( relativeProgress > 1.0f || items == 0 )
 		{
-			ItemStack is = inv.getStackInSlot( 3 );
+			ItemStack is = tile.getStackInSlot( 3 );
 
 			if( is == null )
 			{
-				IInscriberRecipe ir = inv.getTask();
+				final IInscriberRecipe ir = tile.getTask();
 				if( ir != null )
 				{
 					is = ir.getOutput().copy();
@@ -262,9 +256,9 @@ public class RenderBlockInscriber extends BaseBlockRender<BlockInscriber, TileIn
 		}
 		else
 		{
-			this.renderItem( inv.getStackInSlot( 0 ), press, block, tile, tess, x, y, z, f, renderer );
-			this.renderItem( inv.getStackInSlot( 1 ), -press, block, tile, tess, x, y, z, f, renderer );
-			this.renderItem( inv.getStackInSlot( 2 ), 0.0f, block, tile, tess, x, y, z, f, renderer );
+			this.renderItem( tile.getStackInSlot( 0 ), press, block, tile, tess, x, y, z, f, renderer );
+			this.renderItem( tile.getStackInSlot( 1 ), -press, block, tile, tess, x, y, z, f, renderer );
+			this.renderItem( tile.getStackInSlot( 2 ), 0.0f, block, tile, tess, x, y, z, f, renderer );
 		}
 	}
 
diff --git a/src/main/java/appeng/client/render/blocks/RenderBlockSkyChest.java b/src/main/java/appeng/client/render/blocks/RenderBlockSkyChest.java
index 3f96075d..a71561e0 100644
--- a/src/main/java/appeng/client/render/blocks/RenderBlockSkyChest.java
+++ b/src/main/java/appeng/client/render/blocks/RenderBlockSkyChest.java
@@ -84,15 +84,13 @@ public class RenderBlockSkyChest extends BaseBlockRender<BlockSkyChest, TileSkyC
 	}
 
 	@Override
-	public void renderTile( BlockSkyChest block, TileSkyChest tile, WorldRenderer tess, double x, double y, double z, float partialTick, ModelGenerator renderer )
+	public void renderTile( BlockSkyChest block, TileSkyChest skyChest, WorldRenderer tess, double x, double y, double z, float partialTick, ModelGenerator renderer )
 	{
-		if( !( tile instanceof TileSkyChest ) )
+		if(  skyChest == null )
 		{
 			return;
 		}
 
-		final TileSkyChest skyChest = tile;
-
 		if( !skyChest.hasWorldObj() )
 		{
 			return;
@@ -101,7 +99,7 @@ public class RenderBlockSkyChest extends BaseBlockRender<BlockSkyChest, TileSkyC
 		GL11.glEnable( GL12.GL_RESCALE_NORMAL );
 		GL11.glColor4f( 1.0F, 1.0F, 1.0F, 1.0F );
 
-		final IBlockState metaData = tile.getWorld().getBlockState( tile.getPos() );
+		final IBlockState metaData = skyChest.getWorld().getBlockState( skyChest.getPos() );
 		final ResourceLocation loc = METADATA_TO_TEXTURE[ ((BlockSkyChest)metaData.getBlock()).type == SkyChestType.BLOCK ? 1 : 0 ];
 
 		Minecraft.getMinecraft().getTextureManager().bindTexture( loc );
diff --git a/src/main/java/appeng/client/render/blocks/RenderBlockSkyCompass.java b/src/main/java/appeng/client/render/blocks/RenderBlockSkyCompass.java
index 27b7ed3f..b354ae80 100644
--- a/src/main/java/appeng/client/render/blocks/RenderBlockSkyCompass.java
+++ b/src/main/java/appeng/client/render/blocks/RenderBlockSkyCompass.java
@@ -182,15 +182,13 @@ public class RenderBlockSkyCompass extends BaseBlockRender<BlockSkyCompass, Tile
 	}
 
 	@Override
-	public void renderTile( BlockSkyCompass block, TileSkyCompass tile, WorldRenderer tess, double x, double y, double z, float partialTick, ModelGenerator renderer )
+	public void renderTile( BlockSkyCompass block, TileSkyCompass skyCompass, WorldRenderer tess, double x, double y, double z, float partialTick, ModelGenerator renderer )
 	{
-		if( !( tile instanceof TileSkyCompass ) )
+		if( skyCompass == null )
 		{
 			return;
 		}
 
-		TileSkyCompass skyCompass = tile;
-
 		if( !skyCompass.hasWorldObj() )
 		{
 			return;
@@ -200,7 +198,7 @@ public class RenderBlockSkyCompass extends BaseBlockRender<BlockSkyCompass, Tile
 		GL11.glColor4f( 1.0F, 1.0F, 1.0F, 1.0F );
 		GL11.glCullFace( GL11.GL_FRONT );
 
-		ResourceLocation loc = new ResourceLocation( "appliedenergistics2", "textures/models/compass.png" );
+		final ResourceLocation loc = new ResourceLocation( "appliedenergistics2", "textures/models/compass.png" );
 
 		Minecraft.getMinecraft().getTextureManager().bindTexture( loc );
 
@@ -214,7 +212,8 @@ public class RenderBlockSkyCompass extends BaseBlockRender<BlockSkyCompass, Tile
 		CompassResult cr = null;
 		if( skyCompass.getForward() == EnumFacing.UP || skyCompass.getForward() == EnumFacing.DOWN )
 		{
-			cr = CompassManager.INSTANCE.getCompassDirection( 0, tile.getPos().getX(), tile.getPos().getY(),tile.getPos().getZ());
+			final BlockPos compassPos = skyCompass.getPos();
+			cr = CompassManager.INSTANCE.getCompassDirection( 0, compassPos.getX(), compassPos.getY(), compassPos.getZ());
 		}
 		else
 		{
diff --git a/src/main/java/appeng/client/render/blocks/RenderQuartzOre.java b/src/main/java/appeng/client/render/blocks/RenderQuartzOre.java
index 5d05808a..16f1b3a5 100644
--- a/src/main/java/appeng/client/render/blocks/RenderQuartzOre.java
+++ b/src/main/java/appeng/client/render/blocks/RenderQuartzOre.java
@@ -48,16 +48,15 @@ public class RenderQuartzOre extends BaseBlockRender<QuartzOreBlock, AEBaseTile>
 	}
 
 	@Override
-	public boolean renderInWorld( QuartzOreBlock block, IBlockAccess world, BlockPos pos, ModelGenerator renderer )
+	public boolean renderInWorld( QuartzOreBlock quartz, IBlockAccess world, BlockPos pos, ModelGenerator renderer )
 	{
-		QuartzOreBlock blk = block;
-		blk.setEnhanceBrightness( true );
-		super.renderInWorld( block, world, pos, renderer );
-		blk.setEnhanceBrightness( false );
+		quartz.setEnhanceBrightness( true );
+		super.renderInWorld( quartz, world, pos, renderer );
+		quartz.setEnhanceBrightness( false );
 
-		blk.getRendererInstance().setTemporaryRenderIcon( ExtraBlockTextures.OreQuartzStone.getIcon() );
-		boolean out = super.renderInWorld( block, world, pos, renderer );
-		blk.getRendererInstance().setTemporaryRenderIcon( null );
+		quartz.getRendererInstance().setTemporaryRenderIcon( ExtraBlockTextures.OreQuartzStone.getIcon() );
+		boolean out = super.renderInWorld( quartz, world, pos, renderer );
+		quartz.getRendererInstance().setTemporaryRenderIcon( null );
 
 		return out;
 	}
diff --git a/src/main/java/appeng/client/render/blocks/RendererCableBus.java b/src/main/java/appeng/client/render/blocks/RendererCableBus.java
index 29909444..70826d42 100644
--- a/src/main/java/appeng/client/render/blocks/RendererCableBus.java
+++ b/src/main/java/appeng/client/render/blocks/RendererCableBus.java
@@ -136,12 +136,12 @@ public class RendererCableBus extends BaseBlockRender<BlockCableBus, TileCableBu
 	}
 
 	@Override
-	public void renderTile( BlockCableBus block, TileCableBus t, WorldRenderer tess, double x, double y, double z, float f, ModelGenerator renderer )
+	public void renderTile( BlockCableBus block, TileCableBus cableBus, WorldRenderer tess, double x, double y, double z, float f, ModelGenerator renderer )
 	{
-		if( t instanceof TileCableBus )
+		if( cableBus != null )
 		{
 			BusRenderer.INSTANCE.renderer.overrideBlockTexture = null;
-			t.cb.renderDynamic( x, y, z );
+			cableBus.cb.renderDynamic( x, y, z );
 		}
 	}
 }