Pretty sweet idea Aurich. Personally, as a potential buyer, I want to see spinning disks (plural). Im tired of magnets in front of the flippers.
The question I have for the designers is; is it a coding issue with disks and rewards or is it a physical issue, or both? Is it an issue with the spinning disks being analog driven and stopping them on the gun for rewards? Maybe all that needs to be done is to simplify the original design. Instead of 3 analog rotating disks, make them 3 digital (one speed) disks and get rid of the inserts. Then, they can either show map rewards virtually on the display; or do something else that wouldn't be a coding nightmare (if that's the issue), and maybe when you hit the M-A-P targets, one disk starts rotating which increases scoring 5%; spell M-A-P again and get the 2nd disk for 10% scoring, and then the 3rd for 15% scoring.