tburky,
You bring up a very good point about Ra values, and surface adjustments. Abralon pads, IMO, wear out very quickly. It got to the point that I would have a magic marker at the spinner, and put a line on the pad before every use, so I could gauge how often I used the pad. A slightly used 2000, acts more like 4000, a 1000 with 10 uses, acts like..., it drives me nuts!! Anyway, I have found that using them by hand with water, not on the spinner, seems to help them hold up longer, and be a little more consistent. Also, I have been going back to the taxi cabs (again by hand)as of late, and am able to get a little more texture on the ball. I have found that my Invasion has "broken in" using 1200 taxi cab, with a little bit of bite in the late mid lane, and good finish down lane.
One other note for you, I have always used more surface on a ball than I thought necessary, and use it for a few games, so that it gets a little lane shine on it. That way, I have a more consistent reaction for a longer period of time. I have been doing this for years, and just have been validated by the USBC's Ra and surface studies on longevity of cover texture retention. If you don't have the patience to put the games in, use surface, with a coat of polish over top of it. This will somewhat simulate the lane shine effect, although you will not get the smoothing of the peaks and valleys of the cover as you would rolling the ball down the lane.
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Tommy Gollick
Storm Regional/Pro Shop staff
Red Crown Pro Shop Harrisburg, PA
stormbowling.com