I have no financial interest, but thought I would share a recent discovery that may be of assistance.
I recently purchased the 1" x 42" belt sander/grinder from Lee Valley (leevalley.com/wood/page.aspx?c=2&p=44884&cat=1,43072) and have been thrilled with it, especially for freehand sharpening. Unfortunately, I was not as comfortable using it for tools where more precision was needed, like plane and spokeshave blades.
Unfortunately, LV didn't sell any hand tool jigs made for that belt grinder. Although I am a very loyal LV customer (and continue to be), I did some searching and discovered that Viel, the manufacturer of the grinder, makes grinding jigs for it. They even ship to the states! (vieltools.com/prod.php?s=OQ==&sc=MQ==&l=ZW4=]).
They were very friendly and even willing to modify one of the jigs (the logosol knife jig) so that it would work to flatten the tops of plane and spokeshave blades.
Just thought I would pass this on to anyone who might be interested.