2020 frame spool holder

I like designs that require no infill or supports.
The only part with infill is the roller.

Tried many spool holders. The bearing ones were a PITA to install and remove a spool. The ones where the spool sits between 4 bearings would sometimes cause too much bind and the free bearing ones caused filament to unroll itself when the roll was almost empty.
This design allows you to simply mount the spool without dismantling anything and has just the right amount of friction.

I printed with 4 walls for the main frame and enough walls on the rod to make it full.
Translate the rod -1 to -1.5mm in the Z direction to print it horizontally

There is a 0.3 degree angle from the main arm to the rod and after about a week of printing, they become square.

I glued the rod to the frame and put an m3 screw through the top of the rod going into the frame.