I guess all I was trying to say is both a belt grinder and a bench grinder with a paper wheel are both free hand grinding, and the motion is very simular. I don't know what the speed of your grinder is but my cheap HF belt sander seems a touch slower than the stone on my bench grinder is. I'm just not sure the paper wheel is going to be much different for you than a high grit belt or a lether belt on your belt grinder. I personally think even ground edges just take a little time and care even with a jig or some kind of system. Putting an even edge on a unsharpened knife can be difficult. Considring what you already have I'd suggest roughing in your edges with the belt grinder. Even them up with a DMT clamp and coarse hone, then finish the edge with what ever you use to just sharpen with now. Maybe a paper wheel would be a good final step if you go that way.