I am not a fan of Sterns flipper system. A single coil winding that is "pulsed" when in hold mode creates a lot more issues than the pennies saved by doing it this way saves I believe.

But what would I know.......

if you dislike the operator then hold the flipper button in for a few minutes on a new stern. 9 times out of 10 it will kill the mosfet and blow the flipper fuse.