OK guy's and gal's have been watching a couple of people throw a few Motiv balls at the small center we bowl at and liked what we saw. The wife has a 715C drilled with a 4" pin to pap at 2000 light polish, speed around 15 to 16 and a 45 degree or so release not alot of rev's. Thinking the lower RG core might help some in the rev department also thanks