"Grant Erwin" wrote: (clip) to make up an adapter for different tips (clip)
by making a part that threads onto his torch.(clip)
^^^^^^^^^^^^^^^
How about sacrificing one of his present tips by brazing or silver soldering
it into a piece of pipe or tubing, and making that one end of the adapter.
Of course, I would do that only if there is no other way. (And if you gain
more than you lose by doing it.)