This is a remix of NathanMichaelMoore's excellent design.
I could not use his design because I have a neck strap balancer (thing 1748966) already screwed onto the mount.
I removed the top face of the switch protectors to eliminate the need for supports there.
I also added embossed text on the horizontal beams which I painted over with a Sharpie.
This is held on with an elastic strap around the case.
You could also use velcro strap (up to 20mm wide).
As with the original design, you can bend the switch protectors down with a heat gun.
This will also fit the Flysky FS-i6X and the Turnigy TGY-i6.