I have no problems with my Xcel part. I do put a light coat of extender on it, keep it clean, but mine gets through the heads, has plenty of continuation.
For the heavier oil, I use the XXcel, also no problems, I don't polish it just clean it and go.
The XXXcel has jet to be drilled, not much to say for that one, but the lanes I use is getting a new machine and , so they say, will be using different patterns with heavier oil week to week, will have to see on that.
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AZ Guy aka: R & L Bowlers Pro
rlbowlerspro@cox.net
www.rlbowlerspro.comSleep is over rated.