Just like the parent thing, but for self-aligning bronze bushings that have a 16mm outer diameter at the flange (which you can get at techpaladin.com).You can get the belt clamps from github.com/prusajr/PrusaMendel/tree/master/metric-prusaI've uploaded the .scad files that I modified to make these parts. They may have additional dependencies, but you should be able to grab those from Josef Prusa's github at github.com/prusajr/PrusaMendel/tree/master/sourceIf you use these bushings, you may be interested in my compatible X-ends: http://www.thingiverse.com/thing:16291