Z-Probe for Kossel fan holder by marbalon

#### What is this?
Z-probe is used to measure print head distance from build platform, commonly used in bed autoleveling procedure.

This z-probe is designed to be attached to [printing head](http://www.thingiverse.com/thing:1085088) designed by [marbalon](http://www.thingiverse.com/marbalon).

#### Z-probe in action
https://www.youtube.com/watch?v=-UleSjEZu5o

#### Remarks
After some tests it turned out that this probe mount has too big offset (X=30, Y=-25) to take accurate measurement