Standoffs for PCB w/ M3x20mm screws

For attaching the PCB to the brain and minimizing the risk of shorts
Clips to close open belt

Clips are designed for 6mm wide GT2 timing belts, but the model is
parametric.
Considerations during the design were:
- holding force
- high stiffness to minimize hysteresis
- ease of installation
- allowing for excess belt length to spill out
Groove mount for hot end

The groove mount I received with my hot end from MakerFarm was too large
and had the wrong hole spacing for mounting to the effector. I quickly
designed this and it seems to work well, although it could be made
smaller.