Well the er9x TX and ardupilot combo is finished !
I use an Ardupilot and display it on the TX LCD on 10 screens (all backlight)
No external things hanging out !
All internal in the 9x.
Plus I have an autopilot with GPS, waypoints, stabilization, auto mode, takeoff/landing, and more to come.
Pic 1 is latitude/longitude ......great for lost plane
Pic 2 stuff that goes in plane
Pic 3 xBee 2way telemetry unit in er9x.
Looks really cool with 2 antennas too !
Put FPV video on plane and you have a UAV that costs less than a USED Reaper (if you could get one)
Cost ??? about $300.00 Is YOUR plane worth it ?