New Filament Spool Holder (Revision 3)

Revision 3:
- Slightly longer hook to fit Monoprice.com spools!
- Added lateral stabilizer
- Separated into 2 files (hook & base)
Enjoy!

Revision 2:
Now includes corrections based on spool measurements by irawans.

- Now compatible with 32 mm hole diameter spools!
- improved junction structure
- Screw holes adjusted (positioning, diameter)
- Uses even less plastic!
- Kept 1-piece design - no additional parts needed besides 2 sets of screw/nut.

V. 2.0 Description:
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