My EBC has caps on all of the rollovers and on the targets behind the drops. All of mine are intact except for the one I cut from my right rollover when it was repeatedly scoring ghost hits after the machine "warmed up". My rollover seems to work fine without it. I will replace it eventually, but right now I can't find a place that has both the plastic parts I need and a capacitor. I can't get to the min order from GPE.
I find that the targets behind the drops are generally hard to score even though I have the switches adjusted and clean. They test out with a gentile tap of the finger; there is just not much spare room between the bumpers. More of a snooker table than a pool table, I'd say.