This is a kit of parts to install opto endstops on your mendel max. The Y endstop is designed for the lasercut aluminium silicon heated bed.print all parts with your favorite material. Only the adjustable z-endstop should be printed in ABS. Replace the x-carriage clamp with the provided one and attach to it the adjustable z-endstop flag and the x-endstop. Attach a flag (I use PCI bracets) to your x-carriage. Attach the z-endstop support to your printer with the z-enstop fixed to it. Attach a PCI bracet to the y-flag-support and clamp it to the lasercut heated bed support. Attach the y-endstop to the y-endstop support and attach this last to your printer.You will need m3 bolts and nuts for the adjustable z-endstop flag support.