About this 3D model

Along the same idea of the excellent ancestor : one screw hold the endstop, the second hold it but also tighten the printed part. The difference is this one place the endstop closer to the rod. (fyi : there is 17mm between the M3 screws center-to-center, in case it can be used for microswitches) http://reprap.org/wiki/Hall-%CE%98