Glass grinders.

I work in etched glass, not stained. But I like to work with odd shapes, so
I've considered a glass grinder, and I have a few questions.

I'm curious as to how badly the edge is chipped after its been ground. I
know the stained glass crowd puts came or foil around the edge, so it isn't
an issue. But for me, it might be. Can someone send me a close-up pic of
the edge of a piece of glass after it's been ground so I can see the finish?
Also, it looks to me that most grinding heads are 3/4 to an inch tall.
Would they'd work on 3/8" or 1/2" glass? Seems like it'd be OK, but wonder
if anyone out there has had experience with this?

Thanks.

Bill