Space Invader Toilet Paper Holder Remix

This is an Space Invader Toilet Paper Holder REMIX from sebisebman: There are only some small modification to the original, mainly:

1.) Some provision for mounting it at the wall
2.) inside some empty space to save some filament....

Please note: Improvement 2 (empty space inside) strongly depent on printer settings (eg. infill) When you have a lower rate of infill (25% and below) it could be that the version "left... right_without_empty_space" save more filament than the "links ... recht