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https://www.youtube.com/watch?v=TTUQyEr-sg0

Maybe that Beam of Light you keep seeing, is coming from above; it is Easter you know,,,,:shrug:

I watched the whole video,,,, I then slapped myself really hard,,,,,:(

The only thing I took away from that video was that the man is really enthusiastic about his edges & his new microscope. ...

Ahh,,, but is that as smooth as BBS (Baby Butt Smooth)? :hmmm:

O.K.,,,,,,,,,,,,,:shrug:

Happy Easter,,,,:angel:

I would not put a lot of thought into "a beam of light" running the edge of the razor,,, that is a reflection of light that you see, not a beam.
I'm not trying to be a smart a$$, just that...