Quoted from Terry1:I understood that the Hawaii, Mystic Gate &
Double Up were among the last machines before the solid state units.
Yep, that's correct. Then in the 70s, Bally moved back to 100% EM until 1980.
Hawaii is also the heaviest bingo ever made.
There's a thread here https://pinside.com/pinball/forum/topic/some-nice-looking-bingo-pinballs-came-up-on-cl
that you may wish to check out - we try to post games from around the States - 20 or 25 hole.
20 hole games are quite different - I enjoy them, but many folks I know that are 25 hole players tend to shy away from them. They can be quite a bit harder than a 25 holer to maintain a good stable of replays.
I got a chance to play this excellent solid state game with Vic - and boy, he's right! You can employ all kinds of solid state tricks like coin multipliers. You can get in trouble FAST on this machine.