I have built four of these and they fly great on two channel.I print them
them out using 3x3 preference on Microsoft printer . IT comes out bigger than original and some changes like slot for fuselage and motor
have to be adjusted and the slot at rear of fuselage. they all have to be made smaller but then to me it flies even better than the original which I have made and also flies great. The bigger one is a little slower and works better for my grand kids
Flies great and easy to build, thanks for sharing. Wanted to make sure it flew well before skinning (thanks @GrizWiz) so that is the next step because a very stable flyer overall for everyone. Even the 6 year old took a turn, though he should stick to 2ch for now, the plane was able to take some really hard hits with ease.
I did trim the gray ESC holder and glued it to the underneath so it has a "factory" trap door to close in the battery. Not sure what you did on the bottom but it is straightforward enough to experiment with.