Bill,
In order to keep the tool rest from slipping a bit, I made a slip
collar (end grain cocobolo) that goes around the tool post between the
banjo and the bottom of the tool rest This will keep the rest at
proper height and it will not slip. Also there is the added advantage
of making height setting idiot proof. Yes, I know, if you invent
something that is idiot proof, someone else will invent a better idiot.
(I don;t know whose quote that is, but it is great).
robo hippy