Speedmaster head hypothetical

Single blade cutters. The throat is now epoxy which does not hold an edge as well as the steel would.

Just curious. Why do you pick out the 50 deg seats as being bad at low lift. The 45 deg seats should be better than the 50 at low lift.

And a smaller throat will help low lift flow on a 50 deg seat. A larger throat (theoretically) helps high lift flow.