> I think He even used Tin Foil if I remember.

Hey, Jonce, you are showing your age!  I call it "tinfoil," too,
and my wife kids me.

I have tried it in the past, but have found the best solution
is to clean the pot metal from the splines of the shaft and
then tighten the arm back on so the splines could bite fresh.

I once tightened too much and snapped a shaft.  I managed to
replace it with only loosing the dash and pulling one side
back a little.  Don't go there!

Richard