CarbonoidSpool - Yet another reusable filament spool

**CarbonoidSpool** - Yet another reusable filament spool

While I was looking for *MasterSpool* compatible filaments I found the wonderful simplistic *SlantSpool* design by **Slant3D**:
https://www.thingiverse.com/thing:2850604
This spool prints super easy, faster than the original *MasterSpool* by **richrap** (https://www.thingiverse.com/thing:2769823) and uses less raw filament. There’s only one part in the design you have to print twice. The two halfs of the spool connect with a simple l