Martian GoPro / XiaoMi 30° Mount with 5mm extra height

SnappyHH's GoPro/Xiaomi Yi mount for the Martian looks great, but on my 255mm Martian with Cobra 2208-2000 motors, the DAL 6045 props flexed just enough to bump the bottom of my camera. I did a quick remix of http://www.thingiverse.com/thing:1560448 to add 5mm extra height under the camera to keep the props from hitting.

I use a couple zip ties to attach the camera. That works ok, but the camera does come out during big crashes. A velcro strap might be a better option.