you are missing the point of several of the last few posts
if you share what else is in your head about this gadget, not just the rotating capacitor,
more, better useful information may be provided.
a sketch of a few boxes labeled with functions, one high level function per box, with a few interconnects
will help one or another of us to help you
as an analogy, you keep talking about the tires without talking about the car
so how about a few boxes, such as motor, drive train, steering, wheels,
etc and some idea of interconnects?
complicated is not a problem
obscure is