Belt clip designed to hold two GT2 belt-ends on a CoreXY carriage. Allows adjusting belt tension. Nothing fancy.Print with one shell, high infill, and very slow speeds. You may need to increase your curve-slicing resolution to get the GT2 profile right. You should probably print both L and R on the same plate so each gets time to cool the small features. Fits perfectly printed on my R2x in ABS with no scaling. YMMV.