Jig to use for sharpening pruning knife

[michaelco]

Any ideas on how to sharpen the following knife?

http://www.orchardsedge.com/item/t630-11?referer=tools%2ftina

[Herman Trivilino]

I think the consensus is that there's no good way to sharpen a concave blade like that on a Tormek.  Reshaping the grindstone is the only way I know of, and that's not really a viable option.

[michaelco]

Thought this was going to be the situation...

Thanks for the guidance.