I needed a flag for the optical endstops on the Prusa Mendel I am currently building. The flag's length is quite long, with the intention to clip it off where convenient.This is my first thing[TM]. Be gentle ;)This and future mendel parts and stuff live in https://github.com/byteborg/mendelpartsRead the story to this part: http://blog.byteb.org/2011/12/y-axis-endstop-flag.htmlMeasure, check screw diameter, print, mount, adjust, clip off the end, be happy.