Filament Spool Roller Base for <=70mm Filament Spools

Alternative Slim 70mm filament Spool Roller Base for MMU to use in a 5 spool filament compartment. Original MMU filament spool roller were to bulky. Cut the aluminum tubes to 90mm and use the bearings as meant. 

I use these in my modified Anybox setup: https://www.printables.com/de/model/70041-mmu-buffer-for-anybox-filament-drybox