I use the little 2 inch top wheel and a ton of wd40. It's very hard for me, but it works. This blade is .020 thick from edge up about
.25 then I just pushed the grind up toward top. Totally sucks to do this on my grinder.
I only ever flat ground with that machine. If you do that, make sure you have the platen squared up. You many need to bend it a bit. you can adjust the front to back and trueness to the belt with 3 allen screws at the base of the platen.