F Murtz fired this volley in news:yp4hr.5616$%
:

I cut only those gears I can't buy:

yep.

"Stock" gears are pretty cheap compared to the tooling and time you have
to spend.

The last set of gears I made was in the mid 1980's, because they had to
be fabric/phenolic, and I couldn't find a set anywhere made of them.

It's a lot more efficient in time AND cost to adjust your design (if you
can) to fit off-the-shelf gears and worms.

LLoyd