3D printer Filament spool holder

Spool holder to sit on top of a Mini Up printer, helps to feed Filament in straight and direct, excellent for 'wood' filament' and may be adapted for almost anything. Fits various spools with hole diameters of 57.5mm, 52.5mm, and 32mm.
Use 4 Skate bearings "608" size, bore 8 mm, outer diameter of 22 mm, width of 7 mm (press 2 into each Spool holder, gently press them in flush to the outer face and they will run true).
Axel, use 8mm Round bar.
Legs and braces, I used Aluminium tube, 12mm d