Filament Roller - Con lăn đỡ cuộn filament

Filement holder with the bearings inside the rollers instead of the frame.
(Reduces the overall width of the entire assembly).

Comes with two roller lengths:
- shorter one for spools up to 70mm width
- longer version for spools up to 90mm

Just needs four 608 ball bearings for assembly.
Frame parts are just press fit into the bearings.

No other hardware (screws or threaded rods) required.

Update:

I fixed the issue with the too small pins on the frame.
For some reason they turned out undersized in the first version.
They should be a proper press fit now as well.