I have one of those oxygen generators that patients with a breathing mask use. I think it is called LifeLine or something. I use it with the Bernzomatic Oxy-Propane torch kit, the cheesy one the hardware store sells. For fuel I use Mapp and for the oxygen I use the LifeLine oxygen generator. It has a fowmeter, and it puts out 5 CFH. I am not sure of the torch tip size, but I think Bernzomatic only gives you one choice. The torch works really well for small brazing and soldering. It surprises me how hot it will heat up medium size pieces of metal red hot. The torch is of course, a toy compared to a real brazing torch, but I guess it is like an aircrafter size torch or a small Henrob size torch. It has a very fine flame, way finer than a pencil point propane-air torch. And no rip-off priced small oxy tanks to buy at the hardware store!
--Doozer