Knee chair promo with FPV drone

I completed production of a full-size prototype of my knee chair, of course, I have deviations from the drawings and corrections, a little crookedly oblique (of course from the hands), I’m generally satisfied with the prototype, I checked how sits on it (I sat on it all day) if sitting correctly, in principle, upholstery is not even necessary. What do you think comrades, a suitable chair?