Hello, Ive been accumulating parts tools etc for the past 2 years in anticipation of building a myford boy traction engine. The last tool and possibly the most critical one is a torch for all the boiler brazing. Living on disability i cant just run out and buy a sievert or bullfinch etc. My question is , can i build a propane one like the ones used for the foundry's Ive seen in the hundreds of videos Ive watched over the last 2 years in preparation of the build. They get hot enough to melt aluminum and brass and i would be a leg up on casting my own wheels and flywheels for other projects down the road when i could afford to build the rest of the foundry. I realize i need to reflect the heat back at the boiler as it is being heated. And it is 2" copper tube not a 5 or 6" boiler. So im just looking for a little advice before i ruin a 50$ piece of copper tube. Any way i really have learned a lot from this site and have read most of the question and answers trying to pick up machining tips. Yesterday i couldn't spell machinist, today well i can spell it but thats about all. Thanks in advance, Dave Port Charlotte Fl.