Amazing that someone spent a lot of time and money engineering and developing this thing. I did not listen to the video, just looked for a couple of minutes.
I own one and it works great (but very messy as shavings quickly fill the inside). Also, caution is needed when seating the cutter or it CAN dig too deep and fracture the disc. GENTLE PERSUASION is the key to success
Sketchy Science at best, has faulty manual control over the Speed of rotation which can cause chatter in the cut, Pressure on the cutting blade, and how deep to cut. That leaves far too much up to chance to be anything credible.
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