I have had many requests asking how I set up the Gimbal and FPV on the Cheerson CX20, finally I put together a demo.
The Gimbal is the plastic version of the Walkera G2D from Banggood for less than £50 ( http://www.banggood.com/Walkera-G-2D-Camera-Gimbal-for-iLook-iLook-Gopro-3-Plastic-Version-p-920780.html )
The FPV Transmitter is the Skyzone TS5823 5.8Ghz 32 channel transmitter, I got it from Ebay, but hobbyking have them for £16.50 (http://hobbyking.com/hobbyking/store/__63114__skyzone_ts5823_5_8ghz_32ch_a_v_200mw_mini_fpv_transmitter_v2_.html )
One thing I didn't mention is using 2 rubber bands to hold the GoPro onto the Gimbal, the original comes with a (rubbish) plastic clip!
Have fun!