I called up my driller at the Pro shop and said, get me a Nano Pearl with a lay out of 4 1/2 x 41/2.
However I didnt say anything about where to put the mass bias and right now I'm away from my bag to take a look.
But at 4 1/2 x 41/2 the ball rolls beautifully towards the end of the mids and then turns very sharp coming into the dry.
And it doesnt go sideways either off the dry which I was concerned about, also, the ball came with a 1-2" pin. I'm so impressed with this ball I will get another on with the same specs before they go bye-bye
Summer arsenal: Now throwing ROTO-GRIP