I've got plenty of dimples. Wolverine magnet is really banged up already. I lowered it early on as it was a touch high, but it still is getting chewed up. Tried putting a mylar circle on it but it got destroyed immediately. Cut the center out of the mylar and the outside part is doing well.
I also have shooter lane damage already, like the paint didn't stick to the wood, so when the ball dented the wood down the paint bubbled up like mylar would. On the inside the bubble dried out finally and flaked off ~3/4", still have a small bubble on the other side ~1/2". Once it dries and flakes off I'll add some hard-as-nails and maybe maylar, and a cliffy.
Not too worried about any of it though, metal ball banging around it's going to happen. My 2005 LOTR dimpled up pretty good right off the bat, and even my STTNG shows some dimpling. No where near the same of course, but it is there.
I didn't have an e ring, but put a snap ring on the magnet shaft and it is better. But I also installed a shaker last night so who knows! Snap rings aren't as smooth, but I buffed it a little and added a touch of oil. Probably change it out for a real e ring at some point.