8-axis Cube Core (assembly)

Note: this thing is not a complete puzzle, this is just a core

Description

I needed a 8-axis core for my Redi Cube clone. Usually 3D printed cores do not provide enough strenght and tend to crack on layers. I searched for a simple design (at least simple for printing), that is strong enough and also provide a way to tune tensioning. Here it is.

Pros:
- Uses regular rubik's cube core, screws and springs
- Easy for printing
- All springs mechanism is located inside the core. Attached parts require only a space for a nut

Cons:
- This design does not fix axis orientation - it may slightly move under external force. This may be ok for some puzzles (e.g. Face Turning Octahedron), but Redi Cube gets too loose

Core diameter is 44mm

Materials needed:
- Standard Rubik's cube Core
- 6x sets of Screws and Springs
- 8x M3 12mm screws

Printing and assembly
Print the following number of parts:
- 6x Cap
- 6x Cap Base
- 8x Corner

Cap Base shall be glued to the Cap (th