RAMVA guys know everything about tools.
I need to do some copper pipe sweating on the old homestead, so I dug the old Benz-o-Matic propane/MAP gas torch out of the box o' tools I inherited from my Dad. It's one of those little brass ones that threads onto a small bottle.
The orifice seems to be clogged. A loyal consumer would toss it and buy another; while a tinkerer would attempt to clean it. That's what I want to do. That orifice is darn small - just a few mil judging by eye. If I knew the diameter I could get a bit of music wire (?) and ream the hole out (ahem). Or maybe there is a Known Method for cleaning such things -- some solvent that I could try?