I use map pro and oxygen. I find map uses a lot less oxygen than propane to get to the required heat, and it is much less volatile than acetylene, so somewhat safer. Also much much cheaper! (I use one small 400ml cylinder of map to roughly 10l of oxygen)
London Based Frame builder and Mechanic @ Rakshasa Customs, Leyton.
Mainly MTB, SS/FXD, with a dash of CX.