Hypercube X carriage bushing with POM/acetal filament inserts

This is a printable bushing for the X carriage of the Hypercube 3D printer by Tech2c and it's intended for use with carbon fiber tubes; it's a replacement for the original dual bushing holder and the expensive Igus bushings.

Instead of trying the almost impossible task of printing new bushings entirely on POM, I made this one so I could just insert POM/Acetal/Delrin filament sections into PLA printed bushings. I decided to make 4 slots in 90 degrees spiral, so the carbon fiber tubes I'm using