Mechanical Endstop v1.0b Through-hole remix

After a few experiments with unicorn and laser etching, I remixed my previous design. Haven't made this yet, but gearing up to do so now.

There are two ways to make this:

Use a Unicorn pen to etch-resist a PCB
Use a Laser or LaserUnicorn ( http://www.thingiverse.com/thing:6846 ) to etch a resist off a PCB