diff --git a/src/main/java/storagecraft/StorageCraft.java b/src/main/java/storagecraft/StorageCraft.java
index e50763db9..fdbc08876 100644
--- a/src/main/java/storagecraft/StorageCraft.java
+++ b/src/main/java/storagecraft/StorageCraft.java
@@ -30,6 +30,7 @@ public class StorageCraft
 		public static final int SOLDERER = 7;
 		public static final int WIRELESS_TRANSMITTER = 8;
 		public static final int DESTRUCTOR = 9;
+		public static final int CONSTRUCTOR = 10;
 	}
 
 	public static final String ID = "storagecraft";
diff --git a/src/main/java/storagecraft/StorageCraftBlocks.java b/src/main/java/storagecraft/StorageCraftBlocks.java
index 068c92c25..66104040a 100644
--- a/src/main/java/storagecraft/StorageCraftBlocks.java
+++ b/src/main/java/storagecraft/StorageCraftBlocks.java
@@ -1,6 +1,7 @@
 package storagecraft;
 
 import storagecraft.block.BlockCable;
+import storagecraft.block.BlockConstructor;
 import storagecraft.block.BlockController;
 import storagecraft.block.BlockDestructor;
 import storagecraft.block.BlockDetector;
@@ -27,4 +28,5 @@ public class StorageCraftBlocks
 	public static final BlockSolderer SOLDERER = new BlockSolderer();
 	public static final BlockWirelessTransmitter WIRELESS_TRANSMITTER = new BlockWirelessTransmitter();
 	public static final BlockDestructor DESTRUCTOR = new BlockDestructor();
+	public static final BlockConstructor CONSTRUCTOR = new BlockConstructor();
 }
diff --git a/src/main/java/storagecraft/block/BlockConstructor.java b/src/main/java/storagecraft/block/BlockConstructor.java
new file mode 100644
index 000000000..d4c3ab929
--- /dev/null
+++ b/src/main/java/storagecraft/block/BlockConstructor.java
@@ -0,0 +1,72 @@
+package storagecraft.block;
+
+import net.minecraft.block.ITileEntityProvider;
+import net.minecraft.client.renderer.texture.IIconRegister;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.IIcon;
+import net.minecraft.world.IBlockAccess;
+import net.minecraft.world.World;
+import storagecraft.StorageCraft;
+import storagecraft.tile.TileConstructor;
+
+public class BlockConstructor extends BlockBase implements ITileEntityProvider
+{
+	private IIcon sideIcon;
+	private IIcon connectedIcon;
+	private IIcon disconnectedIcon;
+
+	public BlockConstructor()
+	{
+		super("constructor");
+	}
+
+	@Override
+	public TileEntity createNewTileEntity(World world, int meta)
+	{
+		return new TileConstructor();
+	}
+
+	@Override
+	public boolean onBlockActivated(World world, int x, int y, int z, EntityPlayer player, int side, float hitX, float hitY, float hitZ)
+	{
+		if (!world.isRemote)
+		{
+			player.openGui(StorageCraft.INSTANCE, StorageCraft.GUI.CONSTRUCTOR, world, x, y, z);
+		}
+
+		return true;
+	}
+
+	@Override
+	public void registerBlockIcons(IIconRegister register)
+	{
+		connectedIcon = register.registerIcon("storagecraft:constructorConnected");
+		disconnectedIcon = register.registerIcon("storagecraft:constructorDisconnected");
+		sideIcon = register.registerIcon("storagecraft:side");
+	}
+
+	@Override
+	public IIcon getIcon(IBlockAccess world, int x, int y, int z, int side)
+	{
+		TileConstructor tile = (TileConstructor) world.getTileEntity(x, y, z);
+
+		if (side == tile.getDirection().ordinal())
+		{
+			return tile.isConnected() ? connectedIcon : disconnectedIcon;
+		}
+
+		return sideIcon;
+	}
+
+	@Override
+	public IIcon getIcon(int side, int damage)
+	{
+		if (side == 3)
+		{
+			return disconnectedIcon;
+		}
+
+		return sideIcon;
+	}
+}
diff --git a/src/main/java/storagecraft/container/ContainerBase.java b/src/main/java/storagecraft/container/ContainerBase.java
index a5bd69af3..abe52e947 100644
--- a/src/main/java/storagecraft/container/ContainerBase.java
+++ b/src/main/java/storagecraft/container/ContainerBase.java
@@ -61,13 +61,13 @@ public abstract class ContainerBase extends Container
 
 		if (slot instanceof SlotSpecimen)
 		{
-			if (clickedButton == 2)
+			if (clickedButton == 2 || player.inventory.getItemStack() == null)
 			{
 				slot.putStack(null);
 			}
-			else
+			else if (slot.isItemValid(player.inventory.getItemStack()))
 			{
-				slot.putStack(player.inventory.getItemStack() == null ? null : player.inventory.getItemStack().copy());
+				slot.putStack(player.inventory.getItemStack().copy());
 			}
 
 			return player.inventory.getItemStack();
diff --git a/src/main/java/storagecraft/container/ContainerConstructor.java b/src/main/java/storagecraft/container/ContainerConstructor.java
new file mode 100644
index 000000000..2a4c51ca8
--- /dev/null
+++ b/src/main/java/storagecraft/container/ContainerConstructor.java
@@ -0,0 +1,34 @@
+package storagecraft.container;
+
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.inventory.IInventory;
+import net.minecraft.item.ItemBlock;
+import net.minecraft.item.ItemStack;
+import storagecraft.container.slot.SlotSpecimen;
+import storagecraft.tile.TileConstructor;
+
+public class ContainerConstructor extends ContainerBase
+{
+	class SlotConstructor extends SlotSpecimen
+	{
+		public SlotConstructor(IInventory inventory, int id, int x, int y)
+		{
+			super(inventory, id, x, y);
+		}
+
+		@Override
+		public boolean isItemValid(ItemStack stack)
+		{
+			return stack.getItem() instanceof ItemBlock;
+		}
+	}
+
+	public ContainerConstructor(EntityPlayer player, TileConstructor constructor)
+	{
+		super(player);
+
+		addSlotToContainer(new SlotConstructor(constructor, 0, 80, 20));
+
+		addPlayerInventory(8, 55);
+	}
+}
diff --git a/src/main/java/storagecraft/gui/GuiConstructor.java b/src/main/java/storagecraft/gui/GuiConstructor.java
new file mode 100644
index 000000000..e3a128052
--- /dev/null
+++ b/src/main/java/storagecraft/gui/GuiConstructor.java
@@ -0,0 +1,48 @@
+package storagecraft.gui;
+
+import storagecraft.container.ContainerConstructor;
+import storagecraft.gui.sidebutton.SideButtonCompare;
+import storagecraft.gui.sidebutton.SideButtonRedstoneMode;
+import storagecraft.tile.TileConstructor;
+import storagecraft.util.InventoryUtils;
+
+public class GuiConstructor extends GuiBase
+{
+	private TileConstructor constructor;
+
+	public GuiConstructor(ContainerConstructor container, TileConstructor constructor)
+	{
+		super(container, 176, 137);
+
+		this.constructor = constructor;
+	}
+
+	@Override
+	public void init(int x, int y)
+	{
+		addSideButton(new SideButtonRedstoneMode(constructor));
+
+		addSideButton(new SideButtonCompare(constructor, InventoryUtils.COMPARE_DAMAGE));
+		addSideButton(new SideButtonCompare(constructor, InventoryUtils.COMPARE_NBT));
+	}
+
+	@Override
+	public void update(int x, int y)
+	{
+	}
+
+	@Override
+	public void drawBackground(int x, int y, int mouseX, int mouseY)
+	{
+		bindTexture("gui/constructor.png");
+
+		drawTexturedModalRect(x, y, 0, 0, xSize, ySize);
+	}
+
+	@Override
+	public void drawForeground(int mouseX, int mouseY)
+	{
+		drawString(7, 7, t("gui.storagecraft:constructor"));
+		drawString(7, 43, t("container.inventory"));
+	}
+}
diff --git a/src/main/java/storagecraft/gui/GuiHandler.java b/src/main/java/storagecraft/gui/GuiHandler.java
index ef9ec09ed..3f7c59f2e 100644
--- a/src/main/java/storagecraft/gui/GuiHandler.java
+++ b/src/main/java/storagecraft/gui/GuiHandler.java
@@ -6,6 +6,7 @@ import net.minecraft.inventory.Container;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.world.World;
 import storagecraft.StorageCraft;
+import storagecraft.container.ContainerConstructor;
 import storagecraft.container.ContainerController;
 import storagecraft.container.ContainerDestructor;
 import storagecraft.container.ContainerDetector;
@@ -16,6 +17,7 @@ import storagecraft.container.ContainerImporter;
 import storagecraft.container.ContainerSolderer;
 import storagecraft.container.ContainerExternalStorage;
 import storagecraft.container.ContainerWirelessTransmitter;
+import storagecraft.tile.TileConstructor;
 import storagecraft.tile.TileController;
 import storagecraft.tile.TileDestructor;
 import storagecraft.tile.TileDetector;
@@ -53,6 +55,8 @@ public class GuiHandler implements IGuiHandler
 				return new ContainerWirelessTransmitter(player, (TileWirelessTransmitter) tile);
 			case StorageCraft.GUI.DESTRUCTOR:
 				return new ContainerDestructor(player);
+			case StorageCraft.GUI.CONSTRUCTOR:
+				return new ContainerConstructor(player, (TileConstructor) tile);
 			default:
 				return null;
 		}
@@ -91,6 +95,8 @@ public class GuiHandler implements IGuiHandler
 				return new GuiWirelessTransmitter((ContainerWirelessTransmitter) getContainer(ID, player, tile), (TileWirelessTransmitter) tile);
 			case StorageCraft.GUI.DESTRUCTOR:
 				return new GuiDestructor((ContainerDestructor) getContainer(ID, player, tile), (TileDestructor) tile);
+			case StorageCraft.GUI.CONSTRUCTOR:
+				return new GuiConstructor((ContainerConstructor) getContainer(ID, player, tile), (TileConstructor) tile);
 			default:
 				return null;
 		}
diff --git a/src/main/java/storagecraft/nei/CraftingHandlerSolderer.java b/src/main/java/storagecraft/nei/CraftingHandlerSolderer.java
index 97b447351..e6b979b82 100644
--- a/src/main/java/storagecraft/nei/CraftingHandlerSolderer.java
+++ b/src/main/java/storagecraft/nei/CraftingHandlerSolderer.java
@@ -15,7 +15,7 @@ import storagecraft.tile.solderer.SoldererRegistry;
 
 public class CraftingHandlerSolderer extends TemplateRecipeHandler
 {
-	public class SoldererRecipe extends CachedRecipe
+	class SoldererRecipe extends CachedRecipe
 	{
 		private ArrayList<PositionedStack> ingredients = new ArrayList<PositionedStack>();
 		private PositionedStack result;
diff --git a/src/main/java/storagecraft/proxy/CommonProxy.java b/src/main/java/storagecraft/proxy/CommonProxy.java
index aeae67d4c..9777bdea3 100644
--- a/src/main/java/storagecraft/proxy/CommonProxy.java
+++ b/src/main/java/storagecraft/proxy/CommonProxy.java
@@ -30,6 +30,7 @@ import storagecraft.network.MessageStoragePull;
 import storagecraft.network.MessageStoragePush;
 import storagecraft.network.MessageTileUpdate;
 import storagecraft.tile.TileCable;
+import storagecraft.tile.TileConstructor;
 import storagecraft.tile.TileController;
 import storagecraft.tile.TileDestructor;
 import storagecraft.tile.TileDetector;
@@ -75,6 +76,7 @@ public class CommonProxy
 		GameRegistry.registerTileEntity(TileSolderer.class, "solderer");
 		GameRegistry.registerTileEntity(TileWirelessTransmitter.class, "wirelessTransmitter");
 		GameRegistry.registerTileEntity(TileDestructor.class, "destructor");
+		GameRegistry.registerTileEntity(TileConstructor.class, "constructor");
 
 		GameRegistry.registerBlock(StorageCraftBlocks.CONTROLLER, "controller");
 		GameRegistry.registerBlock(StorageCraftBlocks.CABLE, ItemBlockCable.class, "cable");
@@ -88,6 +90,7 @@ public class CommonProxy
 		GameRegistry.registerBlock(StorageCraftBlocks.SOLDERER, "solderer");
 		GameRegistry.registerBlock(StorageCraftBlocks.WIRELESS_TRANSMITTER, "wirelessTransmitter");
 		GameRegistry.registerBlock(StorageCraftBlocks.DESTRUCTOR, "destructor");
+		GameRegistry.registerBlock(StorageCraftBlocks.CONSTRUCTOR, "constructor");
 
 		GameRegistry.registerItem(StorageCraftItems.STORAGE_CELL, "storageCell");
 		GameRegistry.registerItem(StorageCraftItems.WIRELESS_GRID, "wirelessGrid");
@@ -141,7 +144,7 @@ public class CommonProxy
 			new ItemStack(Items.quartz)
 		);
 
-		// Constroller
+		// Controller
 		GameRegistry.addRecipe(new ItemStack(StorageCraftBlocks.CONTROLLER),
 			"EDE",
 			"SRS",
@@ -259,6 +262,18 @@ public class CommonProxy
 			'I', new ItemStack(StorageCraftItems.PROCESSOR, 1, ItemProcessor.TYPE_IMPROVED)
 		);
 
+		// Constructor
+		GameRegistry.addShapedRecipe(new ItemStack(StorageCraftBlocks.CONSTRUCTOR),
+			"ECE",
+			"RMR",
+			"EIE",
+			'E', new ItemStack(StorageCraftItems.QUARTZ_ENRICHED_IRON),
+			'C', new ItemStack(StorageCraftItems.CORE, 1, ItemCore.TYPE_CONSTRUCTION),
+			'R', new ItemStack(Items.redstone),
+			'M', new ItemStack(StorageCraftBlocks.MACHINE_CASING),
+			'I', new ItemStack(StorageCraftItems.PROCESSOR, 1, ItemProcessor.TYPE_IMPROVED)
+		);
+
 		// Detector
 		GameRegistry.addRecipe(new ItemStack(StorageCraftBlocks.DETECTOR),
 			"ECE",
diff --git a/src/main/java/storagecraft/tile/TileConstructor.java b/src/main/java/storagecraft/tile/TileConstructor.java
new file mode 100644
index 000000000..f4c83f014
--- /dev/null
+++ b/src/main/java/storagecraft/tile/TileConstructor.java
@@ -0,0 +1,174 @@
+package storagecraft.tile;
+
+import io.netty.buffer.ByteBuf;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.inventory.IInventory;
+import net.minecraft.inventory.ISidedInventory;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
+import storagecraft.inventory.InventorySimple;
+import storagecraft.util.InventoryUtils;
+
+public class TileConstructor extends TileMachine implements IInventory, ISidedInventory, ICompareSetting
+{
+	public static final String NBT_COMPARE = "Compare";
+
+	private InventorySimple inventory = new InventorySimple("constructor", 1);
+
+	private int compare = 0;
+
+	@Override
+	public int getEnergyUsage()
+	{
+		return 1;
+	}
+
+	@Override
+	public void updateMachine()
+	{
+		// @TODO: ...
+	}
+
+	@Override
+	public int getCompare()
+	{
+		return compare;
+	}
+
+	@Override
+	public void setCompare(int compare)
+	{
+		this.compare = compare;
+	}
+
+	@Override
+	public int getSizeInventory()
+	{
+		return inventory.getSizeInventory();
+	}
+
+	@Override
+	public ItemStack getStackInSlot(int slot)
+	{
+		return inventory.getStackInSlot(slot);
+	}
+
+	@Override
+	public ItemStack decrStackSize(int slot, int amount)
+	{
+		return inventory.decrStackSize(slot, amount);
+	}
+
+	@Override
+	public ItemStack getStackInSlotOnClosing(int slot)
+	{
+		return inventory.getStackInSlotOnClosing(slot);
+	}
+
+	@Override
+	public void setInventorySlotContents(int slot, ItemStack stack)
+	{
+		inventory.setInventorySlotContents(slot, stack);
+	}
+
+	@Override
+	public String getInventoryName()
+	{
+		return inventory.getInventoryName();
+	}
+
+	@Override
+	public boolean hasCustomInventoryName()
+	{
+		return inventory.hasCustomInventoryName();
+	}
+
+	@Override
+	public int getInventoryStackLimit()
+	{
+		return inventory.getInventoryStackLimit();
+	}
+
+	@Override
+	public boolean isUseableByPlayer(EntityPlayer player)
+	{
+		return inventory.isUseableByPlayer(player);
+	}
+
+	@Override
+	public void openInventory()
+	{
+		inventory.openInventory();
+	}
+
+	@Override
+	public void closeInventory()
+	{
+		inventory.closeInventory();
+	}
+
+	@Override
+	public boolean isItemValidForSlot(int slot, ItemStack stack)
+	{
+		return inventory.isItemValidForSlot(slot, stack);
+	}
+
+	@Override
+	public int[] getAccessibleSlotsFromSide(int side)
+	{
+		return new int[]
+		{
+		};
+	}
+
+	@Override
+	public boolean canInsertItem(int slot, ItemStack stack, int side)
+	{
+		return false;
+	}
+
+	@Override
+	public boolean canExtractItem(int slot, ItemStack stack, int side)
+	{
+		return false;
+	}
+
+	@Override
+	public void readFromNBT(NBTTagCompound nbt)
+	{
+		super.readFromNBT(nbt);
+
+		if (nbt.hasKey(NBT_COMPARE))
+		{
+			compare = nbt.getInteger(NBT_COMPARE);
+		}
+
+		InventoryUtils.restoreInventory(this, nbt);
+	}
+
+	@Override
+	public void writeToNBT(NBTTagCompound nbt)
+	{
+		super.writeToNBT(nbt);
+
+		nbt.setInteger(NBT_COMPARE, compare);
+
+		InventoryUtils.saveInventory(this, nbt);
+	}
+
+	@Override
+	public void fromBytes(ByteBuf buf)
+	{
+		super.fromBytes(buf);
+
+		compare = buf.readInt();
+	}
+
+	@Override
+	public void toBytes(ByteBuf buf)
+	{
+		super.toBytes(buf);
+
+		buf.writeInt(compare);
+	}
+}
diff --git a/src/main/resources/assets/storagecraft/lang/en_US.lang b/src/main/resources/assets/storagecraft/lang/en_US.lang
index 120aa343e..3c34c1f92 100644
--- a/src/main/resources/assets/storagecraft/lang/en_US.lang
+++ b/src/main/resources/assets/storagecraft/lang/en_US.lang
@@ -10,6 +10,7 @@ gui.storagecraft:detector=Detector
 gui.storagecraft:solderer=Solderer
 gui.storagecraft:wirelessTransmitter=Wireless Transmitter
 gui.storagecraft:destructor=Destructor
+gui.storagecraft:constructor=Constructor
 
 misc.storagecraft:energyStored=%d / %d RF
 misc.storagecraft:energyUsage=Usage: %d RF/t
@@ -69,6 +70,7 @@ block.storagecraft:machineCasing.name=Machine Casing
 block.storagecraft:solderer.name=Solderer
 block.storagecraft:wirelessTransmitter.name=Wireless Transmitter
 block.storagecraft:destructor.name=Destructor
+block.storagecraft:constructor.name=Constructor
 
 item.storagecraft:storageCell.0.name=1k Storage Cell
 item.storagecraft:storageCell.1.name=4k Storage Cell
diff --git a/src/main/resources/assets/storagecraft/textures/blocks/constructorConnected.png b/src/main/resources/assets/storagecraft/textures/blocks/constructorConnected.png
new file mode 100644
index 000000000..99d628be6
Binary files /dev/null and b/src/main/resources/assets/storagecraft/textures/blocks/constructorConnected.png differ
diff --git a/src/main/resources/assets/storagecraft/textures/blocks/constructorDisconnected.png b/src/main/resources/assets/storagecraft/textures/blocks/constructorDisconnected.png
new file mode 100644
index 000000000..fffbf8eb7
Binary files /dev/null and b/src/main/resources/assets/storagecraft/textures/blocks/constructorDisconnected.png differ
diff --git a/src/main/resources/assets/storagecraft/textures/gui/constructor.png b/src/main/resources/assets/storagecraft/textures/gui/constructor.png
new file mode 100644
index 000000000..ed6758a12
Binary files /dev/null and b/src/main/resources/assets/storagecraft/textures/gui/constructor.png differ