While at it any favorite ways to lock bushnuts. I intend double
back-to-back
nuts on the bushes and moulding plastic mechanical interlinks between the
2
pots and 3way switch, to stop any future rotation. But where to find an
aesthetic thin nut for the 3way switch, the pot ones would be hidden by
the
knobs.




Occam's razor - copious quantities of hot melt glue will stop any rotation
of the pots, and can easily be removed when necessary.

This combined with Loctite, as also suggested here, which will stop the nuts
coming loose in the first instance.



Blimey, you do tend to overcomplicate things sometimes.

Gareth.