MasterSpool for GREG filament

This MasterSpool set for GREG filament (Saint Petersburg, Russia) which is sold in skeins of 400m, 300m, 100m and 50 meters.
To build the Masterspool you will need three different parts:

- the hub
- the side part (you need two of them)
- and the opening tool.

For example, 400m skein need to print:
- s-hub-greg-300m-400m.STL
- s-side-greg-400m.STL
- s-side-greg-400m_with_label.STL
- s-openingtool.stl (One openingtool should serve for all your this GREG spools.)

If you have Creality 3D pinter (Ender, CR and other) you can print two adapters for mount the original spool holder.

Hub print settings:

- 2 Wall Lines
- 3 Bottom Layers
- 4 Top Layers
- 0% infill
- optimized for 0.4 Nozzle
- supports not needed.

Print settings for side parts and the opening tools print settings:

- 4 wall lines (side parts), 2 wall lines (opening tool)
- 3 Bottom Layers
- 4 Top Layers
- 20% infill
- optimized for 0.4 Nozzle
- supports nod needed

To be continued...