Wanhao i3 & i3 PLUS Clip On Filament Sensor

I can't take much credit for this design because I mashed the two Remixed parts together to make this.
It clips on very nice and works well as a filament sensor and a filament guide also.

This works with the following optical end stop sensor.
http://hobbycomponents.com/home/580-optical-endstop-for-3d-printer-cnc-robotics

*Edit*
Added an extended sensor guide at request, I have not tested this version.