Quoted from MrFancy:1. After rebuilding the flippers (except the EOS switches) a month or so ago, I noticed that the upper right flipper was losing a little bit of power. I checked it and the whole thing was loose, as in I could jiggle the flipper up and down on the playfield way more than should be the case. An issue I'd had when replacing it was that one on the screws that holds the bushing in broke off, so that there are only two screws holding the bushing down. When I checked under the playfield, both of those screws were very loose, and the metal post attached to the flipper had also slid up in the clamp. I tightened everything and now it works fine. I'm wondering though, could that broken screw be what was causing the problem? If so, any ideas about how to get it out?
2. I did my flipper rebuild keeping everything on the underside of the playfield (meaning I didn't take the big metal plates off). Some of the screws that went into the underside of the playfield had nuts on them, but I'm not able to replace those because I can't reach them without taking those big metal plates off. Is that something I should worry about?
When you rebuild your flippers you need to remove the metal bracket so you can access the nuts on the top side of the bushing screws. First you remove the nuts then you remove the screws. Install a new bushing and replace the screws. Once you have the screws tight you hold them in place with the screwdriver and then install the nut and tighten with a nutdriver with a drop of locktight. The nut keeps the screws from loosening, the locktight keeps the nuts from loosening. If done like this they will never come loose again.