Good work Robur. Well done. The translations are very helpful.
The first unit is totally duplicable... NO Katcher, NO Ultrasonics, and the top motor spins at a fixed speed. That makes it a lot more simple to replicate.

Just a thought:

In video two he claims he will turn off the camera for 1-2 hours yet the shadows on the floor (which are formed from the sunlight streaming in though that window over the bench) do not move..

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