Fan holder / mount for E3D v6 - middle part modified

Modified middle part of http://www.thingiverse.com/thing:780379 project to make it possible to adjust mounted fans vertically.

Two versions:

1. simple version with vertical rails
2. rails + mount for 18mm proximity sensor + ability to use screw for tightening the mount

Source file included (DesignSpark Mechanical v2 - rsdoc). Unfortunately base of this remix doesn't include source files :-/

Printed in ABS+.