Mounts for Y-min, X-min, and X-max endstop switches for the Mosaic printer.This is one of the printers we use at the ProtoParadigm workshop ( http://www.protoparadigm.com ) and found this to be an invaluable, but simple upgrade, especially since the switches and electronics for the min endstops were already included in the Mosaic kit.Y endstop mounts on the rear of the carriage, replacing the nylon spacer at the end of the rail.The X endstop can be used for min or max by rotating it. It mounts over the edge of the frame on the top of the machine, and stays in place by friction.The switch mounts to the y-min endstop using two 3m screws with nuts (washers might be a good idea too). The x switches mount using 3m screws screwed directly into the part, no need for nuts or washers.