Went back and corrected this post that contained some bad math. In this post I used by beloved 1" sanding roll to blend a small ridge of 70 degree undercut into the short side radius. I originally stated that the throat size increased to 91%. That is an incorrect number that came from dividing by a valve size of 2.02" instead of the correct valve size of 2.055". Post has been corrected to the actual 89.5% throat size. So, in reality, only a few thousandths of an inch were removed. So
@pittsburghracer, may I have permission to continue using my 1" roll?