Prusa i3 Dual MK8 X Carriage with capacitive/inductive sensor 12/18mm

This is a modified version of Prusa i3 Dual Mk8 X Carriage by bmxorcist.
http://www.thingiverse.com/thing:1347192

My version supports inductive sensors for autobed-leveling.
one stl with 12mm hole for smaler sensors, one with 18mm hole which I use.
Normally the printing size is not affected!

The belt holder for this carriage can be downloaded here:
http://www.thingiverse.com/thing:1003604