Anycubic i3 Mega Spool Holder

This is a mix of many great ideas I've found here. Not fully tested, but works so far.

Customizer link for hub adapter:
https://www.thingiverse.com/apps/customizer/run?thing_id=2555689

Update: Hinge arm clip is now a little thicker. It snaps, but feels too soft.
Changed 4mm holes in left arm to 4.2 so M4 screws don't thread through 2 things.

Gantry spool arm by sdi811
https://www.thingiverse.com/thing:2389919

Side extruder mount by tierradenadie
https://www.thingiverse.com/thing:2544902
(I had to enable supports for my additions)

The original is by Alpharic along with the extruder spacer
https://www.thingiverse.com/thing:2448418

The parametric hub is remixed from AndrewBCN, and a few others
https://www.thingiverse.com/thing:605360

50% infill was used for everything.

The hinge arm uses M6-100 and nut (M6-90 should be fine)

Hubs use 4x 608ZZ bearings, and 2x M8-45 and nut (M8-35 would work on the right side), and a washer or shim on the l