Mini cable spools and stackable spools for loose wires to prevent a mess

Update (Same day as published): 
- Added versions with higher walls for space for more cable.
- Added a version with threads on the edge and a thread connector to connect more spools 
together

Print halves with sort of the same name and screw them together. 
The connector part is for the stackable spools.

Threads are M25x2

Happy printing