D-Shaft Pots and Round-Shaft Knobs

The Mouser carts for the Turing Machine and expanders specify D-shaft pots, but I want to use the round-shaft Davies 1900H clone knobs. They do fit, and work ok, but the D profile of the shafts mean the knobs aren’t properly centred, which doesn’t look or feel great when they’re rotated. Has anyone else come across this issue, and found a good solution?

Incidentally, Thonk do sell D-shaft versions of the 1900H clone knobs in black, but the pointer points in the wrong direction when they’re fitted on the pots from Mouser.


In doubt you better use a cutted and filed match, or other small piece of wood.

I’ll give that a go.