Success -- almost! The issue of the Ball Return kicker kicking too fast, and ball 5 firing the kicker at the end of the game, is not any great insight on my part but pouring over the schematic, especially Motor switches 2B, 1C, 4C, and relay "O." (The Ball Count Relay, again spending a lot of time, had no issues.)
The gaps, yes the gaps. If pinball switches were like auto valves, I would just adjust using my feeler gauge. But alas, all I did was play around with the gaps -- starting on the right -- with the 2B, "O" relay lockin, remembering that it actuates at the end of the cycle (112 deg. - 120). Then 1C opens the circuits to the ball return and trough switches, when actuates at the start of the cycle (0 deg. - 17). And the "O" relay switch that seems to engage and disengage the relay (parallel to the ball return switch), and finally the 4C, (97 deg. - 120).
Thanks to all, and Dave for making me focus on this timing issue, i.e., the hardest problem that I encounter. As I suggested before, an oscilloscope would be great on the motor.
The "almost" part is that the kicker sometimes (1 in 8 times) will kick a 2nd or 3rd time and then the ball doesn't increment. But adjustment for this will be for another day.pasted_image (resized).png