Pretty sure you're onto it right there. As far as I can tell, that Great Lakes Modular aftermarket snubber is compatible with C-11232. In the application notes that does not include PinBot on the compatibility list.

Another maker of a similar product (PinScore) had some disclaimers about their C-11232 replacement, saying, "The C-11232R board is the same as the original C-11232 board. Both are also the same as the C-11232-1, but C-11232R and C-11232 have 3 additional electronic components installed on the board- specifically, C1 capacitor, R1 resistor, and D2 diode. C-11232/R will work in place of C-11232-1 in most applications, but if any operational problems are present with using a C-11232/R in place of a C-11232-1, the 3 extra parts can be removed from the C-11232/R board to make it functionally identical to a C-11232-1"

The specific info there may/may not be exactly useful in this since the replacement parts aren't the same exact design, but at least sheds some light on the fact that this replacement snubber may not be appropriate for this job. I wouldn't go hacking the replacement board hoping it will work; I would try to get an original snubber board and sell the replacement to someone that can use it.

Richard

For what it's worth,

C-11232 is fully populated - relay, capacitor C1, diodes D1 and D2, and resistor R1
C-11232-1 has relay and diode D1, no other components or jumpers
C-11232-2 has relay, 0.1 uF C1, diode D1, and R1 is simply a 0 ohm resistor (essentially a jumper)

My PinBot's snubber board label is long gone but C-11232-2 is what is in my properly functioning game.

Richard