I don't really think it makes much difference how you grind it Steve as long as you get the angle right. An offhand grinder should be fine. I only switched to belt grinding once I'd seen (and copied!) the Sorby setup as I think it's easier for sharpening wood turning tools etc.
This is my much modified BDS250
This is my much modified BDS250
Arbalest, proud to be a member of MetalworkingFun since Sep 2012.