You have done the reading and you do understand the info. This game came with serial coils. If you are not a purist and just want the best working machine then replace them all with the FL-11630 coils with caps and side springs. If you like games original then use Fl-23/600-30/2600 series coils. All 3 coils should be the same size in this game. As far as wiring goes, you need to decide which coils you are going to use first.