"charlieb" wrote in message
...
If you're going with bubinga or any of the exotic
hard woods, you should be able to drill and tap
a hole in the knob for a set screw. Don't go
with a fine thread thouugh. Anbd when you tap
the hole, cut a little, back the tap out to clear
chips and go a little more.
^^^^^^^^^^^^^^^^^^^^
Chances are this method will work, and if you don't remove the knobs very
often, it should last a long time. If the threads eventually strip, I
suggest inserting a Helicoil. That should last forever. For myself, I
think I would just go ahead and do it with a Helicoil to start with.

Another possibility: look around for an old radio, amplifier or something
that has wood or plastic knobs. Chuck them in your lathe and cannibalize
the inserts.