This thread gave me the courage to, gulp, take apart the score motor on a Snow Derby project I’m working on. The first photo is near the beginning of the breakdown, after I had removed the single switch stack at position 3.

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I did take the score motor assembly apart for cleaning, but I prefer to leave the remaining components on the board (that's what I've done while going through everything else on the bottom board, I left the score motor for last, everything else on the board has been gone through). As I've done elsewhere on the board, I simply cleaned the major crud off the board itself with alcohol on paper towel.

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In addition to cleaning up the metal parts, I managed to clean all the switch contacts with alcohol and burnish and reinstall them without breaking off any soldered jumpers between switch stacks. It was great to have that kind of access to all the switches. Here's the before and after comparison (sorry, I did't mean to attach the before photo again, and I can't seem to delete it).

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Many thanks to DirtFlipper and huelagan for your postings on this. (It's too bad you're both inactive at this point so you probably won't see this.)

BTW, this took me far longer than 90 minutes, probably more like 6-7 hours, but I’m glad I did it. I imagine it would go faster now that I've done it once, but I doubt I could do it in 90 minutes!

Hope this gives others confidence to take on this task!

Thanks, MikeO.
I put some superlube on all the dogs and switch parts that contact the cams and posts, as per the OP.