This an an update of some changes I made to my setup in order to make the Goodluckbuy gimbal work well with my f450 and GoPro 2.
When I mumble on in my voiceovers, I sometimes forget some extra details. So the order I did things (not including blowing things up and repairing motor connections) were unscrew the arm, flip it over, reconnect. You may need to reposition the gyro sensor at this point. If you want to use the strap to keep your GoPro in place, then I used a little 3d printed part, but you could also hacksaw or dremel the pre-exisiting cuts further up.
You may also need to adjust the gimbal via the software. I just needed to tell the gimbal that the gyro had changed which way was up. The only important thing to note about the software is that these boards are clones of Alex Moss controllers, so the official software and firmware updates won't work with them, so you have to search for the "nulled" versions of the software