I have an 8" slow speed (1725 rpm) grinder from Woodcraft and the T
handle diamond dressing tool. The *1#&% wheels are out of round by
1/16" and no matter what I do I can not dress them round. The wheels
also do not run true. I suppose it is like the bounce on a bowl.
Once started, one must make an entirely fresh cut to get the bounce
out. But how does one start a new cut? Would a single point diamond
work, and if so where does one buy one of those?

Paul Gilbert