comments on the EdgePro 120 3-wheel motorized unit:
Actually, for kitchen knives, which I must inform you up front I consider to be wasting assets and very replaceable, the EdgePro stuff that is motorized works great, and works very quickly.
Once you reprofile the edge, i.e. put on the double or triple bevel edge (2 or 3 wheel), there is not need to remove a bunch of steel after that.
You can:
1. use an edge straightening steel to keep the edge lined up and sharp
2. use only the 2nd and 3rd wheel to put on a burr and then strop off
3. use the 3rd wheel to straighten out the edge, kind of like a steel.
Would I use them on my folders or big fixed blades? No. Why?:
1. too hard to control to keep a really clean bevel on the knife
2. doesn't handle thicker stock well
3. doesn't put the refined edge on folders or fixed carry blades that I prefer.
I.e., the story isn't one sided... there are pros/cons. I consider my Henckels kitchen knives to be decent quality knives that are utility in nature, and I don't hesistate to grind off a bit of metal WHEN they need such treatment....that takes a while if you are cautious and don't rub off the edge on a cutting board. Usually on veggies/meat, you just roll the edge, so you can steel.
Since I can take a dozen kitchen knives from not-so-sharp to scrapey/shavey in literally 30-60 seconds per knife w/ the EdgePro, i consider it a good tool.