Toller wrote:
Great suggestion; isn't the internet incredible!
It says my idea is correct, but also says to use a guard that covers the
bottom of the disk.
As long as I have the bottom pointed away from me, that shouldn't be
critical, should it?

As long as the wheel doesn't shatter. Had that happen to me once, I
was wearing goggles. So of course the shrapnel went no where near my
face. Right into my other hand.

If you just keep everything out of the line of rotation you *should* be
ok.