I've got some new flipper nylons, but afaik everything else on the flippers were done when I bought it, so I'm not too sure if there is anything else I can do.  I figure it may be a bit of a wait on decals, so I might get some felt to put on the jig and flip the pf and just go over every solder and double check all connections too.

Check for slop in your flipper linkages, change out if needed and replace coil sleeves while your at it all cheap parts that vastly improve game play