Anybody have a flamefast gas/air torch tucked away somewhere they are not using?

No.

Can we ask what you're looking to construct?

For brazing my other projects, mainly brass and copper.

It will be pretty useless to be honest. When you say brazing brass and copper what filler material are you planning to use? If you intend to use brass rods to then technically you will be welding it due to the filler rod being the same material composition as the parent metal and here lies the problem. FlameFast torches don't have the ability to produce a focused hot flame so you just end up melting the entire part into a puddle. And that's only if you manage to get it hot enough.
You would be better off with an oxy propane setup.

[Edited on 11/6/26 by fazerruss]