Seems within the limits for me. Sometimes planes are unstable even if symmetric. This one goes into oscillations and instability in some turns, Maybe try to experiment with weight distribution. Also, I wonder if these little stream stabilizers placed on top of wings would actually work better if made from "wing" part. But on the other hand I had trouble fixing wing on top of another wing like that. Good luck, hope you fix it
Seems within the limits for me. Sometimes planes are unstable even if symmetric. This one goes into oscillations and instability in some turns, Maybe try to experiment with weight distribution. Also, I wonder if these little stream stabilizers placed on top of wings would actually work better if made from "wing" part. But on the other hand I had trouble fixing wing on top of another wing like that. Good luck, hope you fix it