Yes, I can see how you could delay the ICP and produce more power at the top end, because the more agressive grind would allow the motor to rev higher. The higher it revs, the more power it makes. Like you said, it is just an air pump. If it were my motor, I would want to make more power throughout the entire rpm band where I could use it, not just at the top end to make a big splash and sell magazines.

I have gone back and added more info on the last post.