Rock-ola 424 Issue - Selector pin not resetting intermittently

Ok, I will describe what I *have* done already in order to fix this
issue. Using the service manual "Sequence 7 - Selection Lever Reset"
page, we see power going through the play control relay, then #2
Micro, through the A/B snap switches, along to the wobble disc circuit
tracings and the reset solenoids on the read-out arm, to the interlock
relay trip contacts, back to ground. I have cleaned the snap switch
contacts, the interlock relay contacts, the outer part of the wobble
disc, pulled the read-out assembly, tested the solenoids (they work
fine, not sticking), cleaned all the wiper pins, and the 2 contacts
which are held in by thin springy pieces of metal. The interlock
relays seem to function as designed. All this has been fully cleaned,
yet I still have intermittent issues. Sometimes the solenoids pull in
nice, resetting the pin. Sometimes I see the arm attached to the
solenoid 'twitch' - like it's getting partial power. Sometimes I see
nothing at all. This happens on both the inner and outer ring of
selectors. I have not touched the play control relay as of yet, or
examined micro#2. Any other paths I may to explore?
Thanks - S