I agree, good info link.
However, I think I will stick with O2/Ace for the actual braze/soldering. There is one huge missing part of propane/O2. That is the CO2 shield you get with acetylene. From this reading, that is lacking in the propane/O2. However, I think heating for annealing, and some other purposes I have, it would work great, and be much cheaper. Sounds like it actually has much more actual thermal power, just a little less temp, and little more O2 use, and lack of the CO2 barrier.
But certainly useful, if all I need is a fitting and new torch tips. Cutting with propane also sounds very interesting, as cutting will suck a bottle of acetylene dry in no time at all.
Hillbilly Rebel: Unless you are one of the people on this site who are legalling distilling, keep a low profile, don't tell, don't sell.