diff --git a/common/buildcraft/api/blueprints/MappingRegistry.java b/common/buildcraft/api/blueprints/MappingRegistry.java
index 780dd40f..4335d98b 100755
--- a/common/buildcraft/api/blueprints/MappingRegistry.java
+++ b/common/buildcraft/api/blueprints/MappingRegistry.java
@@ -50,7 +50,6 @@ public class MappingRegistry {
 		}
 	}
 
-
 	public Item getItemForId(int id) {
 		if (id >= idToItem.size()) {
 			return null;
diff --git a/common/buildcraft/builders/BuildingItem.java b/common/buildcraft/builders/BuildingItem.java
index e4bf0f5f..f272595e 100755
--- a/common/buildcraft/builders/BuildingItem.java
+++ b/common/buildcraft/builders/BuildingItem.java
@@ -17,6 +17,7 @@ import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.nbt.NBTTagList;
 import buildcraft.BuildCraftBuilders;
 import buildcraft.api.blueprints.IBuilderContext;
+import buildcraft.api.blueprints.MappingRegistry;
 import buildcraft.api.core.Position;
 import buildcraft.core.blueprints.BuildingSlot;
 import buildcraft.core.blueprints.IBuilder;
@@ -222,6 +223,8 @@ public class BuildingItem implements IBuilder {
 		destination.writeToNBT(destinationNBT);
 		nbt.setTag ("destination", destinationNBT);
 
+		nbt.setDouble("lifeTime", lifetime);
+
 		NBTTagList items = new NBTTagList();
 		for (ItemStack s : stacksToBuild) {
 			NBTTagCompound cpt = new NBTTagCompound();
@@ -229,7 +232,16 @@ public class BuildingItem implements IBuilder {
 			items.appendTag(cpt);
 		}
 
-		// TODO: How to write the schematic??? Or load that from the builder???
+		MappingRegistry registry = new MappingRegistry();
+
+		NBTTagCompound slotNBT = new NBTTagCompound();
+		NBTTagCompound registryNBT = new NBTTagCompound();
+
+		slotToBuild.writeToNBT(slotNBT, registry);
+		registry.write(registryNBT);
+
+		nbt.setTag("registry", registryNBT);
+		nbt.setTag("slotToBuild", slotNBT);
 	}
 
 	public void readFromNBT (NBTTagCompound nbt) {
diff --git a/common/buildcraft/core/blueprints/BuildingSlot.java b/common/buildcraft/core/blueprints/BuildingSlot.java
index fd141166..339128e4 100755
--- a/common/buildcraft/core/blueprints/BuildingSlot.java
+++ b/common/buildcraft/core/blueprints/BuildingSlot.java
@@ -11,7 +11,9 @@ package buildcraft.core.blueprints;
 import java.util.LinkedList;
 
 import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
 import buildcraft.api.blueprints.IBuilderContext;
+import buildcraft.api.blueprints.MappingRegistry;
 import buildcraft.api.blueprints.Schematic;
 import buildcraft.api.core.Position;
 
@@ -48,4 +50,8 @@ public abstract class BuildingSlot {
 	public abstract boolean isAlreadyBuilt (IBuilderContext context);
 
 	public abstract Schematic getSchematic ();
+
+	public abstract void writeToNBT (NBTTagCompound nbt, MappingRegistry registry);
+
+	public abstract void readFromNBT (NBTTagCompound nbt, MappingRegistry registry);
 }
diff --git a/common/buildcraft/core/blueprints/BuildingSlotBlock.java b/common/buildcraft/core/blueprints/BuildingSlotBlock.java
index f1dcd748..4558ebad 100755
--- a/common/buildcraft/core/blueprints/BuildingSlotBlock.java
+++ b/common/buildcraft/core/blueprints/BuildingSlotBlock.java
@@ -11,8 +11,10 @@ package buildcraft.core.blueprints;
 import java.util.LinkedList;
 
 import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.tileentity.TileEntity;
 import buildcraft.api.blueprints.IBuilderContext;
+import buildcraft.api.blueprints.MappingRegistry;
 import buildcraft.api.blueprints.SchematicBlockBase;
 import buildcraft.api.blueprints.SchematicMask;
 import buildcraft.api.core.Position;
@@ -124,4 +126,21 @@ public class BuildingSlotBlock extends BuildingSlot implements Comparable<Buildi
 	public boolean isAlreadyBuilt(IBuilderContext context) {
 		return schematic.isAlreadyBuilt(context, x, y, z);
 	}
+
+	@Override
+	public void writeToNBT (NBTTagCompound nbt, MappingRegistry registry) {
+		nbt.setByte("mode", (byte) mode.ordinal());
+		nbt.setInteger("x", x);
+		nbt.setInteger("y", y);
+		nbt.setInteger("z", z);
+
+		NBTTagCompound schematicNBT = new NBTTagCompound();
+		schematic.writeToNBT(schematicNBT, registry);
+		nbt.setTag("schematic", schematicNBT);
+	}
+
+	@Override
+	public void readFromNBT (NBTTagCompound nbt, MappingRegistry registry) {
+
+	}
 }
diff --git a/common/buildcraft/core/blueprints/BuildingSlotEntity.java b/common/buildcraft/core/blueprints/BuildingSlotEntity.java
index 73ae1a02..78e8fbbd 100755
--- a/common/buildcraft/core/blueprints/BuildingSlotEntity.java
+++ b/common/buildcraft/core/blueprints/BuildingSlotEntity.java
@@ -11,8 +11,10 @@ package buildcraft.core.blueprints;
 import java.util.LinkedList;
 
 import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.nbt.NBTTagList;
 import buildcraft.api.blueprints.IBuilderContext;
+import buildcraft.api.blueprints.MappingRegistry;
 import buildcraft.api.blueprints.SchematicEntity;
 import buildcraft.api.core.Position;
 
@@ -54,4 +56,14 @@ public class BuildingSlotEntity extends BuildingSlot {
 	public boolean isAlreadyBuilt(IBuilderContext context) {
 		return schematic.isAlreadyBuilt(context);
 	}
+
+	@Override
+	public void writeToNBT (NBTTagCompound nbt, MappingRegistry registry) {
+
+	}
+
+	@Override
+	public void readFromNBT (NBTTagCompound nbt, MappingRegistry registry) {
+
+	}
 }