RE: Pheonix ICE 80-HV Firmware help.
I would try a known good version of firmware like 3.20 for our use. When new firmware comes out do not update it unless it addresses a known issue or you are having problems. The Firmware is written for helicopters and jets too so the new firmware might only have some feature that will benefit a heli and could reduce performance to the airplane user. They have to write firmware that fits all users but might not be the "best" for F3A so when we find ones that are stable and work well, stay with it unless necessary.