My first hidden tang knife in Show and Tell Posted September 29, 2008 just as soon as i get my forge built...or more correctly, as soon as my master welder buddy gets it done for me! He can just about build a bridge out of scrap cars he's so talented. I found a book on it on ebay, written by two college guys who wanted to build a forge that would run forever on a 40 gallon propane tank, would get to 2500 degrees quickly, and be easily transportable. Everyone who's looked at the plans say it looks like it would do the trick. We're gonna find out. My buddy has the book or I'd tell you what the name of it is.