Proximity Senson Holder for Prusa i3 Rework 1.0 Extruder Wade

This proximity sensor holder is for the "Inductive Proximity Sensor Detection Switch NPN 4mm DC6-36V LJ12A3-4-Z/BX".

I bought this sensor in eBay to ouyou2010
http://www.ebay.co.uk/usr/ouyou2010?_trksid=p2047675.l2559

It can be found here:
http://www.ebay.co.uk/itm/131402459032?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

The extruder body that I have is this one:
http://www.thingiverse.com/thing:119616

I created this in FreeCAD from scratch but based on the work