Tim,
No experience with the Edge Pro, so just speculating, but I think I'd have to agree with Rick's thoughts. Hollow grind shouldn't really affect the sharpening process. I'm thinking I read somewhere that longer blades had a bit more issue being sharpened on an edge pro due to the angles. Not knowing if it was a long blade, I don't know if that was the cause or maybe Vince hit the target and it's a blade issue, but I can't see the the hollow grind making a difference from a sharpening perspective, for whatever that's worth.
Dale
