hello everyone. I assembled a large aircraft with a 4.4‑meter wingspan; its weight is 21 kg. After autotuning, it started behaving better than with standard settings. But it still sways in pitch and the yaw course is unstable, which causes rol to suffer. I suspect the issue is with the tech — it’s causing significant pitch‑speed coupling, but why is it doing that if I have a pitot tube? Tell me where to look for the problem. Which parameters should I change? I’m inclined to think it’s TECS that’s making me feel bad. But then, where does the yaw come from?