Adjustable filament spool holder vor Vulcanus V1

The part is for this amazing printer (Vulcanus V1, CoreXY based): http://www.thingiverse.com/thing:821066

I've needed a simple and easy adjustable spool holder for different types of filament and different widths of their spools. So I made this one - it works like charm! To adjust the width for a new spool simply rotate on the M8 nut holder - the part in the middle will move left or right.

What you need:
- 4x 609zz bearings (9mm inner diameter)
- 2x smooth rod m6 42cm
- 1x threaded r