A woman I know is looking to buy a new torch for oxy-propane use for localised heating of glass. She currently has an old oxy-acetylene torch and is using it with oxy-propane which seems to work OK but the torch seems to be obsolete and tips not available and she only has a 2 tip, when tried with my OA torch a 5 or 7 worked much better for the task. Many torches are available cheaply for OA and some can be gotten with OP mixers.
My question is what benefit does using a mixer designed for OP use have against using a OA mixer for OP.
TIA Dave