Philbert, I see you already liked my post. I haven't forgotten you wanted a good review of all the chain grinders that I have at my disposal. So far I will have the following in my review thread.
Stihl USG
511a
511ax
551462 Oregon (hydro lock ax)
Silvey 300
Silvey 510
NT 511a knock off
Eventually I'll probably be able to add the Foley Belsaw chainsaw chain sharp-all attachment and the MAXX grinder. I also picked up a stick of G-440 Kool-Grind badged with the Granberg name. It's a wax based grinding wheel lube. Never used it but supposed to work on 90% of all grinding applications to keep the grind cooler so you don't detemper the metal. The question is will it slow the grind and take longer...
Anyway stay tuned... Hope to have it up over Christmas.