Spool Holder Base with Easy Filament Loading

I liked the spool roller system originally by hardy74, but I found it hard to load filament through the tiny hole in the base. I re-modeled this base from scratch, removed the interlocking features that I don't use, and added a filament channel with a funnel feature to pass filament under the roller. Loading filament through the hole no longer requires you to pick up the spool holder. I use this with a reverse bowden tube, and no fitting is required on the spool holder for this purpose.