With the middle post issue behind me, I moved on to the METEOR DT bank issues:
#1 - the O and R wouldn't drop in the self test but do drop fine in gameplay and they reset ok
#2 - random targets in this bank don't stay up...one or more targets fall after every reset.
#1 was easy and my fault after reassembling the bank when I cleaned it and put in new targets. The two memory solenoids for O and R were mis-aligned - took them out and screwed them in straight. Works again!
For #2, resetting the bank by hand on my bench worked consistently well, but not in the game. I surmised that the targets were not getting enough height on solenoid-activated resets and therefore could not consistently rest on the fingers of the memory solenoids and instead, they'd just drop. There didn't appear to be an inordinate amount of play on the reset bar, but taking a closer look there are definite worn-in grooves from the DT arms rubbing against it for more than 40 years.
DT01 (resized).jpg
My solution for that was to secure a piece of rigid PETG plastic (1/32" thick) on the bar to give the drop targets a bit more height during reset and more of an opportunity to latch onto the memory solenoid fingers.
DT02 (resized).jpg
DT03 (resized).jpg
Works like a champ so far. Ran Self Test burn-in for 50 cycles, no more random falling targets!