Yes, yours has optos and new trough opto boards so they "should" be fine. Not sure without going into a machine myself, but the far right trough opto maybe is the trough jam? Do you remember what switch number? You can always pop the balls out and wave something in path of the opto to see which one triggers that one you saw. Any “spirited” nudging or happened to have the playfield up for some reason before? If it went away the problem cleared but I’d still be checking over connections at the opto boards for the trough and make sure you have good connections on the switch connections on the bottom right of back box.

LOL! That shouldn't have done it.

You can loosen up the "U" shaped brackets that rest in the lock down bar receiver so that the playfield is better centered. The brass slotted screws on the receiver can be adjusted up and down to make a tighter or looser fit. If the playfield is up you can turn these screws and see how it operates to make the bar fit tighter or looser.

I don't think you messed something up unless you did the right before you had played and noticed the credit dot. As long as it is reading in test and acting normal, you should be ok.

Trough has the plastic spacer fix in it so no divots in a month or two I hope!

This is it:

http://www.marcospecialties.com/pinball-parts/03-16809

Geez, I'm just shocked you played it so much and glad you guys are having a blast. Good for you!