20x20mm aluminum profile microswitch holder for Kossel Max

This an customized version of the standard endstop holder for Kossel Max. As I own a lot of microswitches instead of the standard ones, and there's no available holder, I decided to design my own model. It hooks on the aluminum profile and holds tight. No need for volts or nuts.
Pictures pending!
##### UPDATED (29-9-2015)
I've noticed it's hard to fit the microswitch into the holder. So I modified it to be easier to assemble and a little bit tinnier too.
Source SW file is included