Glad to hear the OP has some early versions! The reason for my question is that when I flew the Chinese rendition, pictures taken of the airplane in flight show an awful lot of "up elevator" (stabilator) in level flight attitude. I haven't flown it but once so far and am looking at ways to move the CG back without adding weight. My thoughts being that perhaps the airplane will be more responsive. Another question - could you do me a favor and compare the early versions with the Chinese version side by side. I'd like to know if the stab has a greater range of travel/throw in the up direction on the early ones? Since you're performing loops with the Chinese one, it may be a moot point - but I'd still like to know...

BTW, I was amazed to hear what was said about another Cox airplane in the original post. I didn't know there were others besides the PT-19 being made elsewhere. Is the made in China, J-3 Cub possibly based on the old bush plane that - at one time - came with wheels, skis, and floats?

Sorry for all the questions but I value the advice from someone who worked at Cox and has knowledge of Tomorrowland.

Hoping the pic shows the amount of UP elevator I'm concerned about to maintain level flight.