Which 2 blade heads (other than Grizzly) are 3:1 ratio???
I think stos and howard hill heads are 3:1
HH are, STOS aren't. Few heads are actually 3 to 1. One of the new heads by Abowyer get's close (the Brown Bear). I believe the new Ashby head is very close as well and may be 3:1.
steel force have a new 3 to 1 single bevel. just ordered some.