There are engineers who deserve their title ... No, but frankly what is this shoe nut that folds the hair before passing through the blades, regardless of the angle of attack? Unbelievable ... To shave 2 mm max, go your way! Even the razor side is not extraordinary ...
Now I have 30 good minutes to shave, by grinding my skin in all directions so that the bristles are sufficiently detached to pass through the blades, an ordeal!