not sure, i have one and even though a layout for a early/smooth roll and hook, it gets down the lane further than anything i have, and flips pretty hard. Can handle a med oil, at the same time, my friend has one drilled to get down and flip over, and it just doesn't, mine has a dark color green pin, his is more neon and lighter if that makes a difference.
--------------------
The Bowler's Edge Pro Shop