The best bloke I’ve ever seen at sharpening, until I went to Japan (and the blokes there barely equal him) is Mathew A or Toolin’ Around from a few other forums.
Matty’s done a lot of stuff round my place, he prefers to use a grinding wheel moving at less than 300rpm - I just whack it on my little lathe actually, and polish (microbevel if you must) with a bit of MDF with some green stuff on it running at the same speed.
I think I’ve got one of those blue wheels, or it might be white. Mat sharpens often, and as do the Japanese knife guys, checks for sharp by dragging the blade across the flat of his thumbnail - if it sticks it’s sharp enough.
Sorry - no fancy gadgets needed.
He did give a demo at someone’s place in the WWF hay days, but I don’t think anyone could see beyond the fact that there weren’t any fancy machines involved!