Re: Need a source for a plastic nut/knob like this
Milt, if I can't find what I want, what you linked to (in b;lack) is the fall back plan
Plan C is this with something lock-tite-ed to the top:

My guess is the local hardware store has something that would screw on to the 3/8" thread. Prefer a 1 piece solution if possible, though
I agree about the distance away from center of gravity.
I wish they were closer, but didn't want interference w/the DMX cable jacks and other stuff
I am going to use tripod stands instead of round base stands.