I was going through my pictures and found these pics I took for viletim of the concept for the nesrgb nes 2 / av famicom adapter:
I used protoboard to figure out exactly how many holes the kit needed to move over to fit. I used foam and random parts to prop the kit into place so I could test that the cases closed around the relocated kit.
The nes 2 / av famicom adapter was manufactured based on these pictures and my detailed explanation about distance and measurements and here's the final product: