Filament Spool Arm

This is a filament spool arm that is loosely based on a design I saw here but cannot find again. Print two arms, one T, and one cap.

Requires:
2x M3 screws and nuts (optional: another 2x)
2x M8 nuts
1x M8 threaded rod (~10cm long)
1x M8 washer
1x 608 bearing