Did you ever get a decent amount of use out of the PRO at a finish with surface? I'm mulling over the idea of getting one and drilling it with the pin under the fingers and taken down to 2000. The idea is to end up with a benchmark(ish) reaction for medium length/volume lanes.
If there are any low-end balls you could have a chance of doing that with it's definitely Roto Grip's HP1 line so I'm thinking this might not be too risky of an experiment. Especially with the core in the Hustle balls.
I have a Pro pin in ring that I've knocked the polish off with a 2000 pad by hand. I wasn't looking for a medium benchmark ball, I just hated the ball at OOB. It has a really heavy roll when I had enough dry (which I liked), but it skated at any sniff of oil or any accidental speed bump. That didn't work at all on my overblocked 42' house shot, it was EXTREMELY over under. So I knocked off the polish and now it's... slightly less over/under?
I've since tried it on a few other house shots that are more blended with a bit shorter of a pattern and it's been better at those houses. However, though adding some surface helped keep the ball from squirting on oil somewhat, it hasn't fixed the issue with speed sensitivity. I'm prone to blasting it through the breakpoint, even with surface. On these other houseshots I find the ball usable but haven't run into a situation where it's my best option.
It's worth noting: I'm a high speed/high revs, speed dominant bowler, around 18 mph at the pin deck. Someone a little softer might find this ball more usable.