Kossel Mini D4 endstop

I was trying to reuse my boatload of D4 microswitches on my Kossel Mini build. Tested in conjunction with electronhacks' Prime Line Roller Carriage instead of slides. http://www.thingiverse.com/thing:215438
Feedback welcome.
Remixed from endstop.stl at https://github.com/jcrocholl/kossel