Here is a picture of a lot of different prototypes in the development of the variable resistor contactor board.
I say board, because it ended up being a circuit board. But initially I was experimenting with a mechanical assembly. Different materials, one piece, two piece, five piece, molded, machined, 3D printed. Eventually milling a circuit board was the most elegant and reliable solution, and the only tradeoff was a small risk in contactor tracking repeatability. That in itself is of no concern - the tolerances on the current parts are wide enough to allow for a little misalignment without any issue or loss of function.