Hi all I fitted a Walkers G2D gimbal to my FC40, the result was brilliant. Had to modify the mounting plate to secure it to the underside of the FC40. I wanted to use the original DJI camera as I have never had a problem with it. So I machined a adaptor plate, I used a piece of 1/2" solid black nylon which I machined to fit into the go pro mounting backplate. The original mounting screw holes were picked up the secure it to the gimbal. A few quick measurements and a recess was machined on the front face to be a snug fit around the DJI camera. For added security I use one elastic band to be one hundred percent sure it will not fall out, see picture. The added bonus I did not have to add any extra weight to the gimbal.