I was speaking of the fact that Mapp generates enough heat to cut therefore you should be able to solder/braze without any problems even on thick material that may absorb or dissipate the heat rapidly. Propane by itself may not have enough BTU's to keep up with such materials. Oxy/Mapp is cheaper than Oxy/Acet as far as fuels go. Tips, if used correctly should last, once you get past the intial cost. IMHO, Mapp would probably save you money in the long run.
John Wright