the second landing was pretty good, and based on the elevon deflection at touchdown I would say that you can give a try at 5 1/4 to 5 1/2 cg.

Don´t worry about landing with the mains first, and the nose well pointed up, this plane doesn´t drop a wing. you may add some extra exponential rate if you find the plane twichy at high speed using this new setting.



Maybe you guys can put a simple strip or warning fence to keep the onlookers out of the way..