diff --git a/src/main/java/mekanism/client/nei/PRCRecipeHandler.java b/src/main/java/mekanism/client/nei/PRCRecipeHandler.java
index 2bb57b551..ecbdd4e9d 100644
--- a/src/main/java/mekanism/client/nei/PRCRecipeHandler.java
+++ b/src/main/java/mekanism/client/nei/PRCRecipeHandler.java
@@ -263,15 +263,15 @@ public class PRCRecipeHandler extends BaseRecipeHandler
 		int xAxis = point.x-(Integer)MekanismUtils.getPrivateValue(gui, GuiContainer.class, ObfuscatedNames.GuiContainer_guiLeft)-offset.x;
 		int yAxis = point.y-(Integer)MekanismUtils.getPrivateValue(gui, GuiContainer.class, ObfuscatedNames.GuiContainer_guiTop)-offset.y;
 
-		if(xAxis >= 6 && xAxis <= 22 && yAxis >= 11-10 && yAxis <= 69-10)
+		if(xAxis >= 6-5 && xAxis <= 22-5 && yAxis >= 11-10 && yAxis <= 69-10)
 		{
 			currenttip.add(((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.reactants.getFluid().getFluid().getLocalizedName());
 		}
-		else if(xAxis >= 29 && xAxis <= 45 && yAxis >= 11-10 && yAxis <= 69-10)
+		else if(xAxis >= 29-5 && xAxis <= 45-5 && yAxis >= 11-10 && yAxis <= 69-10)
 		{
 			currenttip.add(((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.reactants.getGas().getGas().getLocalizedName());
 		}
-		else if(xAxis >= 141 && xAxis <= 157 && yAxis >= 41-10 && yAxis <= 69-10)
+		else if(xAxis >= 141-5 && xAxis <= 157-5 && yAxis >= 41-10 && yAxis <= 69-10)
 		{
 			currenttip.add(((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.products.getGasOutput().getGas().getLocalizedName());
 		}
@@ -291,15 +291,15 @@ public class PRCRecipeHandler extends BaseRecipeHandler
 		GasStack gas = null;
 		FluidStack fluid = null;
 
-		if(xAxis >= 6 && xAxis <= 22 && yAxis >= 11-10 && yAxis <= 69-10)
+		if(xAxis >= 6-5 && xAxis <= 22-5 && yAxis >= 11-10 && yAxis <= 69-10)
 		{
 			fluid = ((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.reactants.getFluid();
 		}
-		else if(xAxis >= 29 && xAxis <= 45 && yAxis >= 11-10 && yAxis <= 69-10)
+		else if(xAxis >= 29-5 && xAxis <= 45-5 && yAxis >= 11-10 && yAxis <= 69-10)
 		{
 			gas = ((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.reactants.getGas();
 		}
-		else if(xAxis >= 141 && xAxis <= 157 && yAxis >= 41-10 && yAxis <= 69-10)
+		else if(xAxis >= 141-5 && xAxis <= 157-5 && yAxis >= 41-10 && yAxis <= 69-10)
 		{
 			gas = ((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.products.getGasOutput();
 		}
@@ -354,15 +354,15 @@ public class PRCRecipeHandler extends BaseRecipeHandler
 		GasStack gas = null;
 		FluidStack fluid = null;
 
-		if(xAxis >= 6 && xAxis <= 22 && yAxis >= 11-10 && yAxis <= 69-10)
+		if(xAxis >= 6-5 && xAxis <= 22-5 && yAxis >= 11-10 && yAxis <= 69-10)
 		{
 			fluid = ((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.reactants.getFluid();
 		}
-		else if(xAxis >= 29 && xAxis <= 45 && yAxis >= 11-10 && yAxis <= 69-10)
+		else if(xAxis >= 29-5 && xAxis <= 45-5 && yAxis >= 11-10 && yAxis <= 69-10)
 		{
 			gas = ((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.reactants.getGas();
 		}
-		else if(xAxis >= 141 && xAxis <= 157 && yAxis >= 41-10 && yAxis <= 69-10)
+		else if(xAxis >= 141-5 && xAxis <= 157-5 && yAxis >= 41-10 && yAxis <= 69-10)
 		{
 			gas = ((CachedIORecipe)arecipes.get(recipe)).pressurizedRecipe.products.getGasOutput();
 		}
diff --git a/src/main/java/mekanism/common/miner/ThreadMinerSearch.java b/src/main/java/mekanism/common/miner/ThreadMinerSearch.java
index 687a55fcb..969cb9b79 100644
--- a/src/main/java/mekanism/common/miner/ThreadMinerSearch.java
+++ b/src/main/java/mekanism/common/miner/ThreadMinerSearch.java
@@ -77,7 +77,7 @@ public class ThreadMinerSearch extends Thread
 			info.block = tileEntity.getWorldObj().getBlock(x, y, z);
 			info.meta = tileEntity.getWorldObj().getBlockMetadata(x, y, z);
 
-			if(info.block != null && !tileEntity.getWorldObj().isAirBlock(x, y, z) && info.block != Blocks.bedrock)
+			if(info.block != null && !tileEntity.getWorldObj().isAirBlock(x, y, z) && info.block.getBlockHardness(tileEntity.getWorldObj(), x, y, z) >= 0)
 			{
 				boolean canFilter = false;
 
diff --git a/src/main/java/mekanism/common/tile/TileEntityBasicBlock.java b/src/main/java/mekanism/common/tile/TileEntityBasicBlock.java
index 51de377d0..7369929a7 100644
--- a/src/main/java/mekanism/common/tile/TileEntityBasicBlock.java
+++ b/src/main/java/mekanism/common/tile/TileEntityBasicBlock.java
@@ -4,6 +4,7 @@ import ic2.api.tile.IWrenchable;
 import io.netty.buffer.ByteBuf;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -29,10 +30,10 @@ public abstract class TileEntityBasicBlock extends TileEntity implements IWrench
 
 	public int clientFacing;
 
-	public Set<EntityPlayer> openedThisTick = new HashSet<EntityPlayer>();
+	public Set<EntityPlayer> openedThisTick = Collections.synchronizedSet(new HashSet<EntityPlayer>());
 
 	/** The players currently using this block. */
-	public Set<EntityPlayer> playersUsing = new HashSet<EntityPlayer>();
+	public Set<EntityPlayer> playersUsing = Collections.synchronizedSet(new HashSet<EntityPlayer>());
 
 	/** A timer used to send packets to clients. */
 	public int ticker;