I was looking at jeweler's torches and some of those are very expensive. Last year I had what was called a "pencil torch" head from Bernzomatic using regular propane tanks and it was pretty good at controlling the flame. Looked just like a regular torch head but was supposed to produce a more controlled pencil flame. It came through the truck fire looking OK, but no longer works. I understand you can use Mapp gas with a regular Bernzomatic sold for propane torches, which I bought one of thinking it would help when I'm trying to go for high heat to bend something. As you say, use what you've got. I have a couple regular old torch heads for general shop use. Good enough for now.
Did you clamp the sections of tank together and then kind of tack it with solder points or just start soldering in a continual bead, removing clamps as you go? I saw in a thread awhile back where someone riveted a tank together and then followed with soldering it up. That would work, but I think yours has a cleaner look. As for my soldering skills... some of those tanks look less than good under the spiffy leather. Soldering a curved surface is kind of tricky. Thanks to your copper tank I stopped wishing I knew how to weld. Copper is good enough and fine for me. Thanks, Bud.
SB
Check with refrigeration people and see were they get there torches from. They have to use silver solder on refrigerators. Just a thought..Curt