Layout: 60 degrees x 4 3/4" x 40 degrees RG: 2.48" Differential: .052" Mass Bias: .020" Surface: 2000 grit sanded Core shape: Asymmetric What I wanted from this ball: I was looking for a stronger ball than the newer Pro Motions I've drilled. Pro Motion seems to be an outstanding medium oil, everyday ball reaction type of product. Some would call it a benchmark type of ball. I wanted something for higher volumes of oil that would out-hook the Pro Motion. What I ended up wit

Layout: 70 degrees x 5 5/8" x 45 degrees RG: 2.55" Differential: .040" Mass Bias: n/a Surface: 1500 grit polished Core shape: Symmetric What I wanted from this ball: I was looking for something that would match up well on drier lane conditions when I needed an increase in length. I needed it to be longer than my IQ Tour Emerald and Astro Physix balls that I had drilled already (see previous reviews). What I ended up with in this ball: I got exactly what I expected out of thi

Layout: 70 degrees x 5 5/8" x 45 degrees RG: 2.49" Differential: .050" Mass Bias: .018" Surface: 4000 grit sanded Core shape: Asymmetric What I wanted from this ball: I was hoping for a heavier oil ball that will still backend quite a bit, with a fairly strong response to the dry boards. If this ball would shape similar to my Pro Motion but hook 3-4 boards more, it would be perfect. What I ended up with in this ball: I didn't really get what I was looking for when drilling t