Piston clearance / notching w/shaved head

Not trying to rain on your parade here....and this is something I don't know a lot about, but I do know for a FACT that MP had a big problem with some of the slant cams. Maybe slantsixdan, Charlie or Frank will chime in on it. I don't know the details, but I KNOW there was a problem somewhere.

All cam manufactures have been down that road with bad bump sticks. They have made there rounds through the net/boards here a few times.