Wall mount and spoolholder - Supportless printing

The great, modular Filler system by HugoG deserves a lot of credit. This V3 design considered the following to improve on HugoG's design:Easier to print Minimal material useMinimal use of spaceStrongEasy to installBackwards compatible with the Filler systemTo improve on HugoG's design, I designed for support-less printing. Most curved surfaces have been replaced for 45 degree angled surfaces. This way there are almost no hard-to-print overhangs. For example, the filament holder can be printed standing upright, or on its side without supports. This system includes everything for all your wall mounting desires. Wall mounts for two 1KG spools. One UP and one DOWNOne spoolholder for 1KG spoolsA self-centering roller with separate bearing pinA 45 degree adapterFurthermore:The UP and DOWN wall mounts can be mounted at the same height of each other saving space on your wallFour 1KG spools can be hung in a small space, without touchingFor effective material use, I used a bit of math an