This is the same as http://www.thingiverse.com/thing:232446, but with a separate microswitch bracket to glue on (makes it easier to print) and with the mounting portion redesigned to fit the extrusion profile for greater rigidity and better alignmentWhen I printed the original part I damaged the Z endstop microswitch mount while trying to remove the support material. I decided to file it off and print a separate microswitch bracket to glue on. This worked fine, but the original part has little support behind the mounting screws, and this caused it to bendif the screws are tightened. I reworked the area behind the mounting holes, so that the position of the motor shaft is more reliably close to the original printer mount. I also had to print a small spacer for the z axis microswitch because witht he plate vertical wall straight it doesn't match too well with the endstop screw. Probably it would be better to adjust the microswitch bracket to be a little offset from the current position