A question... What's your favorite like underground mod??? my is Better furnace's mod.... It's add 3 new furnece's first is iron for that you need iron ingot and a normal furnace, then gold for that you need gold ingot and iron furnace and then finally a diamond one and you need Golden furnace and 8 diamond.... BUT even if you have 8 diamond you cant make it because you need to have iron and gold.... But is that to high ground?? How about Lux' Mods?? Duplicator

This mod adds a new block: The Duplicator It can duplicate any block exept for:
-Gold Block
-Iron Block
-Diamond Block
-Coal Ore
-Iron Ore
-Redstone Ore
-Gold Ore
-Diamond Ore
-Lapislazuli Ore

Just rightclick it with some redstone and it'll work! It will even duplicate Rails and new mod blocks!!!! I KNOW!!! but they are underground so... no one knows about them!!!! COME ON AND GOOGLE MORE STUFF PPL!!!!!!!!