Been building multirotors since Jan 2015, all presently running pixhawk clones, and recently moved into fixed wing. Just built Zeta fx-61 phantom with Pixhawk running Plane f/w, and ULRS for control using homemade Tx/Rx.

I am now the primary dev on the Mavlink->Frsky telemetry project on github (using Teensy for message conversion): https://github.com/athertop/MavLink_FrSkySPort
RC radio is Taranis X9D Plus with X series Rx's, and also ULRS for LRS flying.

Tarot 680Pro Hexacopter build:
* Standard CF frame
* Pixhawk v1 clone with BN880 m8n GPS
* 2 x 6400 4s LiPos in parallel
* SunnySky X4108s 690kv motors, swinging Aeronaut CamCarbon Light 13x6 props
* Hobbywing X-Rotor 40A ESCs (stock code)
* FrSky X8R Rx, with 3DR (clone) 433MHz telemetry radio
* STorM32 driven X-Cam GoPro gimbal (not PH connected), with PlayUAV OSD
* Teensy telemetry converter for FrSky SPort
* AUW = 4.1Kg