I have this JQ. It works really well and is quite clean inside and out for a 40+ year old pin.
I have this set up next to a pinbot with newly rebuilt flippers (by me) and an Addams family. Of course the games are going to feel different, and I don’t have much experience with EMs, but the flippers feel a weak to me (there are 4 flippers, 2 normal and 2 mini).
Looking at the mechs, they seem quite clean. The parts actually look so clean that I suspect they might have been rebuilt recently. I have no idea on service history, only work I did was clean and wax, lamps, new ball, rubber rings and shooter rebuild. Game was purchased from an experienced pinsider.
The mechs look fiddly to rebuild with the fiber piece and the roll pin to deal with...
What do you think, rebuild or leave well enough alone?