Been slowly knocking things off the list on my TZ pin, I have rebuilt the bottom flippers recently to learn the process, still haven't rebuilt the the upper flippers. I did notice the upper left and upper right flipper fire after the bottom flippers when the button is pressed. I can press the flipper button in slightly for the bottom, then a little more for the uppers. I have cleaned the optos with no change. Since it's on both sides I find it a little odd... I noticed the left optos are similar in match, then the right is a mix match of two different optos in terms of height. Could my flipper rebuild have anything to do with this ? Seems weird I never noticed in the 4 months I have been playing/working on it.