Work Sharp here...
This tool was intended for the sharpening challenged, not you guys who have mastered the skill already. There are countless ways to put an edge on a blade, this is ours.
There are two sharpening guides included: 20° and 25°. Or you can use the tool freehand like a belt sharpener to achive any angle you desire.
The spark showering shot you see on our website sharpening the shovel is with the P80 grit belt. This belt was only intended for such applications, not knife sharpening. For knife sharpening we use a P220 ceramic oxide belt to shape the blade to a toothy sharp convex edge, then hone the edge to a hair popping edge with 6000 grit Micro-Mesh. This combo will not damage blade steel and the process takes about 90 seconds (from blunt dull to shaving sharp).
I am not here to change anyone's sharpening methods or sell this at the best ever. I'm simply here to answer questions about our tool and provide information to those who want an idiot proof way to restore an edge fast and easy.
If any of you are interested in this tool please contact me. I'd be happy to provide a few tools to you so you can use it and post your experiences with it in this forum.