Thanks pinhead52 for jumping in. That is a cool array of WS machines in the photo! Let me try and recap the issues:
1. when single scores, 1st base lights up as it should. Another single, 1st & second light up as they should. Another single, 3rd base doesn't light up as it should. I checked/double-checked "C" relay, cleaned, replaced a spring, etc. Still nothing. Will look at the insulators too now.
2. when Home Run target or rollover scored, "Run" score reels advances 1 run as it should. When a man on base (any base) and HR target or rollover scored the "Run" score reel advances 2 runs, as it should. When there are 2 or 3 men on any bases, and HR target or rollover scored, the "Run" score reel advances on 2 runs...instead of 3 or 4 respectively.
3. when single + single + single scored ( as mentioned above, 3rd man on base hole doesn't light up) I can place a man on third by either triggering the 3rd base KO hole or manually adding the man by triggering the "C" relay. When bases loaded, the "star" rollover in middle of field lights up & scores 1,000 points properly. If a single is scored in this situation, no "Runs" score.
4. However, when a man is on 1st base, and triple rollover/target triggered, the "Runs" do score. Same with a double, man on 2nd base, and a double or triple triggered, the "Runs" does score. But, in no scenario does the "Runs" score more than 2.
Some things I tried: removed, cleaned, polished rivets, replaced sleeve, cleaned coil/plunger, checked wiring connections etc. on the "Hit Unit" stepper. Hit Unit stepper rivets are worn down considerably, I did a continuity check on each & they seem good. Cleaned, checked/gapped switches on "A", "B", "C" interlock relays and the "Q" alternate relay. Inspected, cleaned, gapped all score reels including the "Runs" score reels...points all scoring correctly, "Runs" are not as mentioned above - but manually it seems like the "Runs" score reel moves nicely & goes from "9" to "10" runs smoothly.
Sorry for the length of this post, but wanted to get all the issues out there.