Got my B&R jig a week or so ago (after being backordered from brownells for a month and a half). Finally got it setup about a half hour ago on a 10" harbor freight disc sander (really not half bad for $50 or $60). Messed around grinding one pad for a rifle, its close, not professional, but i'm tired (was fixing to go to bed, but i've been putting off setting this thing up for a week and finally had the ambition to get'er done) and the lighting was very poor. The finish on the pad was alot better than I expected right off the disc (I think i have a 60 grit disc on there now). One thing I did notice is if you try to grind on the wrong part of the disc, it gets VERY grabby, you really have to find a sweetspot on the disc and not wander too much. I may change to a belt sander eventually, but the disc was cheap, and I didn't want to invest too much incase this venture was a flop. Any tricks you can share about my setup (you know, those things I'll eventually figure out by experience, but they'd be nice to know now).