Thanks, I'm fairly sure I'll need it at some point in this. Three people have said propane will work, two of them have mentioned actually doing it, one with several different models of torches and the other at a major bike manufacturer. One guy has said he uses an OC, and that he got the idea from someone else on here who also uses it. I'd say I'm in with a decent chance of this working, assuming I can get hold of an OC for a decent price. If there's any doubt about the regulator, I'll get a new propane one as well.

Thanks guys!