One more question: EDIT: FIXED
I just loosened the hex nut to adjust the flipper angle (successfully), but now realize that even after tightening, the whole flipper bat has several mm of vertical travel when I lift it away from pf. This isn't just the vertical post I've screwed onto with the nut, but rather the whole mechanism coming out of the bushing, including the arm. The other 3 flippers have very little travel here.
Is there some way to tighten something so it doesn't move so much vertically through the bushing? When I manually rotate this left flipper it feels a bit rougher than the other 3, which seems related. (I initially thought it was dragging on pf, hence my vertical/gap checking, but there is a gap there.)
EDIT: FIXED, When I locked the nut I pulled the flipper a little too high, which gives it too much vertical latitude. I put a credit card for a gap, then tighten led up while pushing the underside mechanism just a bit to make it even with the armature. Much better.