That's really cool. I know Arlan was working with Calvin Pollett when he first released his existing line of cylinders, wonder if he has any top secret info on this?
Also, I wonder what void this fills, what purpose does it serve? I know I asked Arlan how a Puma would do for an XC engine, and he said it would be worthless. Maybe this is a more well rounded cylinder for the larger displacements.