For anyone following my thread...
For fun I didn't manually fill the jackpot/reserve. I just played the machine instead to see how long it would take to fill - with a glass of wine of course!
It paid out a few times... got a 10 coin and 18 coin here and there, and a bunch of 5 and 3 coin payouts. I could tell when the payout tube filled when it started diverting nickels into the jackpot. It would alternate with the coin box after a win but eventually after a couple hours over two night, the jackpot filled up - then continued to fill the reserve.
It sill amazes me how clever these were designed - and I just realized my machine is about 90 years old!
Added: And now it's full of "Mints of Quality" in the vendor.
