Good day.
Presenting your attention, a model for 3D printing, a unique mechanism for sharpening a knife in the lens.
With the help of which, you can convert any machine into Professional, which will allow you to sharpen both the Classic method and the LENS method.
You can look in more detail on my YouTub channel ChuchaTV https://youtu.be/RZncOcwynks
Also in the Chucha TV SHOP https://chuchatv.exaccess.com, you can purchase a ready-made 3D model of a professional sharpener