While I sharpen higher end Japanese kitchen knives on natural and synthetic waterstones, I generally sharpen outdoor/sporting & "tactical" knives on a 1" x 42" Kalamazoo belt grinder. It works very, very well! I can get a kitchen knife probably 85%-90% as sharp in three minutes on the grinder as I can with forty-five minutes on stones.

Sometimes it makes me want to throw all my water stones down an elevator shaft!
I don’t understand. I know getting a good edge with Japanese water stones takes experience but from what I read and the demonstrations I have seen, they get the job done.
So it takes forty-five minutes. Why throw them down an elevator shaft?
Jeanette Isabelle
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I'm not sure whose twisted idea it was to put hundreds of adolescents in underfunded schools run by people whose dreams were crushed years ago, but I admire the sadism. -- Wednesday Adams, Wednesday