Mark, I am in no way someone who should be giving advice on flat grinding. Only thing I can say is watch the Harvey Dean Video on flat grinding. I watched it 2-3 times and used my grizzly 2" grinder. The video is very instructive.
Matt, you may be a savant, but flat grinding is not easy. Lots of trial, error and experience in getting good flat grinds.
Good luck,
bret