More dumb machine tool questions

I used a Van Norman 570 for several years. They can do a very nice job as long as they're set up properly. The blades have to be set all to the same height and kept sharp. One of the nicest old school machines I've used was a Lempco 545 Grindmatic. That was a fine old machine. But again, unless it's maintained properly, keeping the rock dressed and rollers greased. That Lempco could grind a mirror finish if that's what you were after.