Use Hero 4 on DJI H3-2D Gimbal - Zenmuse H3-2D Hero 4 Modification

Updated version (I showed the ribbon cable installed the wrong way round in the old version). This also works for people that have an H3-3D that came with the pinnout integrated.

In this video I demonstrate how to convert your DJI H3-2D 2 Axis gimbal to be useable for FPV with the new GoPro Hero 4 cameras.

Background: While the Hero 4 is virtually the same weight and form factor as the Hero 3, the pinouts on the rear connector have changed. This means that you can film from the H3-2D gimbal but if you are using iOSD or the upgrade board you won't see an output from the camera.
This modification allows you to use the USB port video output in the same way the newer H3-3D works.

I obtained the USB part from www.buildyourowndrone.co.uk for £2 making this an incredibly cheap mod.