While this printer is down I am printing out all the parts I need with my failed 3 Color Mixing Printer, Printalicious. And these y end caps/ motor mounts are printed in petg and as the picture shows I have already revised this part from my original design..And before I even got the new part with more material installed I realized I need to make some sort of stop for the linear guides so they do not travel off the end of the rails. Back to the drawing board.