Just curious ... did you change the rubber rings early in its life cycle?
I have an LE ... I am having issues with only two things. One is the center drop target which will be fixed by this weekend at the latest (common problem where it's not resting when it's kicked back up ... causes many drop/kick cycles).
The other is sticky flippers ... however, I noticed that there is a *lot* of black gunk dust crap from rubber rings. I switched over to Titan rings a while back ... those are still like new. The junk must have been from my first few sets of standard black rings (which I am done using forever on any machine I have ). That gunk impacted my flippers. The coil stops were fine. A quick cleaning of the sleeves and I had like-new flippers .
Did you have similar problems with the rings, or did you replace them frequently (or replace them with a totally different brand all togeether)?