AM8 Jig for gantry alignment (assembly)

Updates 03/08/2017
Added a 139mm long version.

This is a jig to check if gantry is far enough from the rear part of the frame. Prints without supports and can be fastened to the frame. Both sides should be verified, then, it can be removed, and both nuts along X removed as well, while the nut along Y is used for the inner corner bracket (not in the picture). This jig cannot check if Y and Z extrusions make a right angle, so check the angle with a proper tool. Check picture for better underst