I had large flames jutting out the side off the handle every time I
extinguished the flame (not the little adorable ones that are usual
but huge mushrooms).
You had a torch that flares like that and you want to duplicate it?
While its true that one can hard solder with acetylene /air, it is
not a jeweler’s torch setup. There’s a host of reasons why, you’ll
find info pro and con in the archives, although I could never be
convinced of the pros of acet. Every professional jeweler I know uses
propane or natural gas or hydrogen with oxy but not acetylene/air.
Take this opportunity and get yourself a production torch instead of
a hobby torch. I don’t mean to sound condescending but make your
life easier and not harder. Sometimes you can be better than your
tools but its unusual.