I've done the cannon couple times, once to show my kid russian trainee. Yeah, I was a mentor because it paid a buck more an hour.
Victor said, Rrrricky that won't work......(it don't take much gas) The kid about dropped dead....every head in the shop turned toward us. With his beat red face everyone knew who it was. Even i was shocked how dam loud it was.
Seriously, be easy on the oxy/acet. Best results, light the torch first to crisp flame and snuff it out on piece of wood and then fill your pipe...perfect mixture.