***Note these are not recommended for use. They interfere with the effector arms. I will leave them up for further inspiration.
Here is a slider type carriage designed for open beam extrusion to use on the Mini Kossel. I think the open beam is a different fit than the 1515 from Misumi. The GT2 belt gripper might be useful for other designs and us long enough for open or closed belts. These have not been used for printing yet but fit and belt alignment appears to be good.