This is a very simple endstop bracket for Makerbots mechanical endstop V1.2.  The holes are slightly smaller than M3, so may need to be drilled out a little bit.  The mounting holes for the endstop are recessed to accommodate the heads of the M3 screws (flat head type)Printed with PLA with 1 perimeter and 10% infill, support material turned on.To assemble, insert two M3x8 screws from the back, put the endstop on, and secure with two m3 aircraft nuts on the front of the endstop.  To attach to the v-slot, put 2 t-nuts close to where you want to put the endstop and secure with m3x8 screws