Spoolholder "antijump"

I have always been happy with my spooldholder https://www.thingiverse.com/thing:1775001
Since the rools loosing filament are getting lighter i sometimes had the problem of jumping spools. Inspired by the rollholder in the link, i designed this new spoolholder. The rolls are changeable quick and easy.
The holder can jammed direct with 4 screws and washers; or you can use the mounts to mount the spoolholder to your desk. since the ballbearings are rolling to easily i glued them. Now the axel rolls good enough in the holder.