Do read Steve Richter's response in the RG thread about the Storm/Kegel clinic's. Ball pick up lane shine with use and should be hand scuffed with abralon pads to retain performance. I'd definietly agree with Steve on this. Cell, VG, Invasion, Mutant Cell all show this pick up of lane shine. That maybe because of Storm/Rg's type of resin used in their formulation's I have to say I don't see this as much in my 920T that I keep at 2000 abralon. But I do hand apply a quick going over by hand of a 2000 abralon pad every third time I use in league if I use the 920T a lot. Id' say the same if you use the 916AT a lot. I also clean with the new formulation of solvent based Neo-Tac/Big B Hook-It (after bowling) and that takes off lane shine better than water based ball cleaners. But, I still think the Ra peaks and valley's are effected by usage.
Scott