universal filament spool holder

I designed this spool holder for many different sizes of spools I have met until now.
From smallest 0,5 kg spool to biggest 2,3 kg.
Assembly is very easy, just screw it together and tighten spool.
Central hole in spool should be approx. 50 mm and more. I measured some of them and they are between 50 and 52,5 mm in diameter. All these dimensions the holder can cover.
It does not need bearings, in my opinion, small friction is needed anyway. Rotation is smooth on 10 mm shaft. You can use