Just because others have all the fancy mixing doesn't mean it's a good thing on a first EDF on it's first flights.
The only thing I would suggest is MAYBE a steering gyro as the F-22 has an odd knuckle in the main gear suspension. I suggest this Assan AG61 Anti-sideslip Front Steering Wheel Gyro (rc-castle.com)
Please explain "SUPER SQUIRELLY".
Where to begin? I think if you are going to fix it, maybe you should begin at the beginning and keep it simple. Just because you have an IX20 doesn't mean you have to do the stuff an IX20 will allow you to do. Perhaps you were trying to do too much in terms of programming, SAFE, etc. This is not a hard plane to fly, nor is it a complex plane to set up. Maybe just set it up as a simple 6-ch plane, give yourself 3 different rates and some expo on all control surfaces. Don't worry so much about ELE to flap compensation. Slowing down the flap deployment to 2 seconds makes for less quirkiness. SAFE can be a real problem if you fly too fast (really big, wide turns) or too slow (weird stall characteristics) and particularly if the plane isn't trimmed properly when NOT in SAFE (make sure it's trimmed to fly "hands off" before activating SAFE). My 8s F-22 has no structural mods, no beefed up servos anywhere, basic 6-ch functionality, no ELE to flap comp, simple gyro set up. The maiden was like flying a slow trainer. Landing was like coming down on a marshmallow. The only "fancy" thing I've got on it, is reverse thrust to stop shorter.
Once you get a good maiden out of the way, then start doing "fancy" stuff with your IX. Perhaps those "beefed up" servos were not the ones to use. The stock ones don't shutter and no reversing is required.
An 8s F-22 has more thrust but it really doesn't fly that much faster.
Where to begin? I think if you are going to fix it, maybe you should begin at the beginning and keep it simple. Just because you have an IX20 doesn't mean you have to do the stuff an IX20 will allow you to do. Perhaps you were trying to do too much in terms of programming, SAFE, etc. This is not a hard plane to fly, nor is it a complex plane to set up. Maybe just set it up as a simple 6-ch plane, give yourself 3 different rates and some expo on all control surfaces. Don't worry so much about ELE to flap compensation. Slowing down the flap deployment to 2 seconds makes for less quirkiness. SAFE can be a real problem if you fly too fast (really big, wide turns) or too slow (weird stall characteristics) and particularly if the plane isn't trimmed properly when NOT in SAFE (make sure it's trimmed to fly "hands off" before activating SAFE). My 8s F-22 has no structural mods, no beefed up servos anywhere, basic 6-ch functionality, no ELE to flap comp, simple gyro set up. The maiden was like flying a slow trainer. Landing was like coming down on a marshmallow. The only "fancy" thing I've got on it, is reverse thrust to stop shorter.
Once you get a good maiden out of the way, then start doing "fancy" stuff with your IX. Perhaps those "beefed up" servos were not the ones to use. The stock ones don't shutter and no reversing is required.
An 8s F-22 has more thrust but it really doesn't fly that much faster.
Been flying the last 15 years pretty much all helis, drones and planes. Fun sized, aerobatic, 3D, scale and giant scale. All disciplines. This is the first official EDF/Jet. Game on!
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