I just got a 04 superjet, pretty much stock for now besides a ride plate, intake grate, and freestyle cone. Planning on getting into freestyle, Ive heard this is a good place to start?? So which impeller should I get? I want to jump wakes and do flatwater freestyle for the most part. Seeing posts saying 12/17 skat or 13/17 skat? I am new to this so please help me out.