I drilled one with pin 4 3/8 from axis. Cg 2 1/2 from axis weight hole 2 inches down from axis on val. 29/32 bit 2 1/2 deep. I was using it on a medium sport pattern 39ft. After my Hy Road was too much this gave  the length and pop on the back  I was looking for. Also this is with a 2000 abralon surface.