Over the past almost thirty years, I have taken a dozen woodworking classes with Ernie Conover. Ernie is a master woodworker, woodturner, and a fine teacher.
In this video he discusses different bowl gouge grinds. Ernie does not sharpen with a Tormek; however, much of the information carries over.
https://youtu.be/f-Qwr0uH4eY
Ken