Quote Originally Posted by curious aardvark View Post
So instead of a normal 3mm nut your blue wheel would seat one of those.
They have a nylon insert that grips the bolt thread very firmly and stops the nut from moving by itself.

You could simply replace the brass part with afully 3d printed knob with the locking nut in the base.
This is essentialy what I did, only, effectively, I printed the nylon resistance-ring as part of the knob. I checked the plate level after a couple of prints and it's holding firm