Hi Bowling Friends - A year ago I drilled a Katana Dragon with 70*X5X75*= 145*. I have found this combination to really help. As the lanes broke down or I just wanted to keep the ball in front of me, it works great. I just bought a Storm Proton PhysiX. My thought is 70* X 4 X 65* = 135*. I am looking for these two balls to complement each other. Your thoughts. Thank you - Coach Denny