This is a redesigned carriage for a richrap 3DR printer (or derivative).
It is to be used with a 6mm gt2 belt and 8mm steel rods with 8x12x20 oilite bronze bushings.
The freecad files are included to allow easy modification to other bearing types and sizes.
Also included is my rudimentary clip (2 required for each belt) to link the ends of the belt together.