Mini Filament Spool Holder Extended Rail

I did some dualcolor prints with my Mini so I had to change filament several times during print. This made me want to have two spools next to each other for easier handling, so I extended the original Prusa spool holder rail from 100 to 180 mm.

This is a remix of the original Prusa spool holder rail found at
https://github.com/prusa3d/Original-Prusa-MINI