Firmware Hex file (Betaflight official 4.3.1):
Dump file:
Betaflight 4.3.1 dump for Crux35 analog ELRS V2
Betaflight 4.4.2 dump file for Crux35 analog ELRS V2
If your Crux35 has high throttle oscillations, you can upgrade the flight controller firmware to 4.4.2 and then use this dump file to fix the problem.
Betaflight 4.3.1 dump for Crux35 HDZERO and HD DJI ELRS V2
Manual:
Crux35 Crux35HD DJI and Crux35 HDZERO FPV Racer Drone ELRS V2 manual
Bind procedure video:
There is absolutely nothing useful shown in the bind procedure video- can you post a procedure showing how to bind FrSky version in D16 (FrSky_X) mode please?