Ball speed at least seems a little quicker, something i have been working on, but no speedometer available for conformation. I have always had a 6-12 o'clock release, but have been working on a 7:30-1:30 release. Both releases have added more hook with the expansion, i also attribute some hook to adding in the inserts.. my c-system 2.5 was a nice sorta down and in ball, but now it is a beast, and when the head oil goes away, it is unusable.