fanboi, Look for some hi lites of Delaney Gourley. Really had success with FL using changeup. not sure videos are going to show level of detail you want, but you could do worse than emulate her.
Thanks Rick! These are two interesting gifs. Gourley looks to have slightly less total revolutions than Garcia. Based on the spins I see from release to the plate I calculate the RPS for both to be roughly 26 for Garcia and 15 for Gourley. Assuming a 68 mph riseball and 55 mph CU. So i guess i am still not totally convinced that anyone is throwing 24+ RPS CU's.