I finally got a variable speed motor set up on my new grinder, here's my first attempt at hollow grinding.i didn't have any thing in mind when I started,I just took a scrap of steel and went at it. http://albums.photopoint.com/j/View?u=956336&a=6998387&p=52545539&Sequence=0

Looks like you've got the right idea, Stan. Carry it on now through the finer grits, and learn as you go. You're on a heck of a journey!