first of all, nearly all of this is completly wrong information because almost none of these items are in thaumcraft 3 (the newest version). secondly, you can already duplicate things in the game, i built a machine that makes over 20 diamonds a minuite for free. secondly, the vis condenser uses energy, and takes alot of time, whoever told you otherwise ahsn't played this mod. and lastly, the thaumic duplicator uses 5x the item's vis value to duplicate it, so it is not profitable at all.