It's been a few years since I owned a Surfer.

Struggling to recall, but I was thinking that triple bonus is only possible on the last ball (which starts out with double bonus lit). Someone with the game should jump in here.

Yep, only on the last ball. You can only advance bonus once per ball. After you complete the stars and drops the drops reset so you can complete them again but the stars stay off

On the last ball, you should automatically get 2x bonus.

Well, on five ball it's ball 5 (only). I assume on three ball it's ball 3, haven't tried it. I think there's a 'last ball' relay on one of the banks

Not on a bank, but there is a last ball interlock relay that might do what you suggest.

Hi joetechbob
I write the ruleset from my Surf Champ set to "5 balls per player / game". I write it in the succession You may check if Your pin is functioning complete.

In the first game I do NOT make all Drop-Down-Targets to drop (easyer to describe the functions). One of the lights "A B C D E" is lit --- the light may move to the left when the spinner (P) is actuated - when the pin steps after the loss of a ball - steps to next player / next ball. An unlit "ABCDE" gives 500 points and ONE Bonus, the lit one gives 500 points and TWO bonus.
In balls 1,2,3,4 - at the beginning of a ball: The "U" and the "V" are not lit --- when I play good I can make "double bonus - lighted U". When the pin gives the fifth ball: Automatically the "U double bonus)" is lit --- when I play good I can make "triple bonus - lighted V".
Still I do not make the Drop-Targets to drop --- at the beginning of every ball the "FGHIJ" are all lit - the "KLMNO" are all un-lit. When the ball lands in the Eject-Hole: A hundred points for every unlit "KLMNO" - a thousand points for every lit "KLMNO". When the ball rolls over (lets say) "F": The "F" changes from "lit" to "unlit" AND the "K" changes from un-lit to lit. Same with G-L, H-M, I-N, J-O.
AT THE MOMENT I make the last of the "FGHIJ": The green invitation lights "Q" and "R" are lit: HERE You can make DOUBLE Bonus (playing in ball 1,2,3,4 - the "U" lights up) - HERE You can make TRIPLE Bonus (playing ball 5 - "the light changes from "U to V"). The "Q" and the "R" always give 500 points and one bonus (lit or un-lit). Also at the moment I make the last of the "FGHIJ": The Spinner (P) is lit and changes from 10 points to 100 points.

I start the second game - this game I NEVER touch the "FGHIJ" - but I do make all Drop-Targets (12345) to drop - every hit Drop-Target gives 500 points and one bonus. When all Drop-Targets are down: They stay down --- until I loose the ball.

I start the third game - I first make the "FGHIJ" --- it does not matter if I make the bonus-multiplier --- then I make the targets to drop - at the time I let the last Drop-Target to drop: BINGO: I get 5000 Points AND all Drop-Targets RESET AND the "invitation-lite 'S' HERE You can make an Extraball" is lit - AND the "invitation-lite 'T' HERE You can make an Special-Replay" is lit. And I can make all drop-targets to drop - again 5000 points and the targets reset.

I start the fourth game - I first make ALL Drop-Targets to drop - they stay dropped - THEN I make the "FGHIJ" - BINGO: (Q and R are lighted and) I get 5000 Points AND all Drop-Targets RESET AND the "invitation-lite 'S' HERE You can make an Extraball" is lit - AND the "invitation-lite 'T' HERE You can make an Special-Replay" is lit. And I can make all drop-targets to drop - again 5000 points and the targets reset.

Whatever situation: The "rollover S and T" give 500 points plus one bonus. The INLANE rollover-wires next to the "S and T": Only give 500 points. Greetings Rolf

0Surfer-ipdb-picture-Work-01 (resized).jpg