You might want to look into MAPP or Propylene. It is a LOT cheaper
than Acetylene. It is sold in moderate-pressure bottles filled with
liquid. So, you get many times more fuel in the same size cylinder,
due to the liquid and the lack of packing needed to keep acetylene safe.
It works great for brazing.

Jon

wrote:

Make that a 75 CuFt acetylene tank... Only reason I mention this is
that I'm not sure I can use a #3 or higher tip with that small of a
tank.