My 920T was the first Track ball I drilled when getting on staff with them in May. Another shop here in town had it, so I thought I would get it from him and try it. At first I didn't really think it was very "T", and being a 9 series ball, I thought it should handle oil better. I used it a number of times, and it got some gunk on it that I couldn't wipe off with a towel, so I hit it a 2000 pad on the spinner with some Hook It cleaner as the lubrication instead of water, and then a "dirty" polishing towel to put a little shine/sheen back on, and this ball is a beast. Very controllable. Handles oil fairly well, but really more of a medium/benchmark type ball. I like it when the lanes are slick/ugly, this ball doesn't do anything stupid.
Overall a nice rolling ball, hits good, I think you will like it with some surface adjustments.