Believe it or not, I put the plane down in the weeds today. Missed the runway on the far side. Pilot error is mostly to blame, which includes some performance anxiety with everyone watching and telling me how to land, yelling out "Right Aileron, Left rudder..." I can land fine when no one's around
The audience will get you every time, especially when flying a low-wing that requires more concentration. If you keep at it, you won't have to think before making the next move. It gets to be a natural reflex, like typing. As for the plane's twitching, remember that the Dolphin is less stable than the Avistar and less forgiving as you found out. Don't let that discourage you, however. Get it fixed, and keep working on your skills. It may not be a bad idea to have another Avistar as a spare to use while the Dolphin is down for maintenance.
On to the control surfaces: I took my Rapture to a high altitude to get a better feel of how it reacts to high rates. I got it to snap, and then spiral at 400' twice, then brought it back down for some adjustments. After decreasing the elevator travel to reduce the snap tendency while still enabling dual rates, the plane behaved considerably better. Knowledge gained: Excess elevator will significantly alter the angle of attack and greatly affect the machine's flying characteristics. It may be good to keep that in mind when you are finished with the repairs on the Dolphin. Also, subtle changes in humidity, temperature, air pressure, wind direction, and even localized gusts from rising air in a very small area can make or break a good landing. You'll learn more of this from experience, and which corrections to make.
NorfolkSouthern