wing flutter
that sucks. it sounds like the quality of that kit was even lower than mine. on mine, the motor mount was drilled and tapped in the right spot, but crooked, so i couldn't fix it, the wheel pants were all bent and melted, and in some cases, transparent. i could have done a better job with my pocked lint. the cowel did not fit right, was lopsided, and the wrong color, (a little darker red) the colors did not match in some places, and the re-skinning kits did not quite match any of the colors on the plane, so patching looked "patchy". i guess the best way to check quality now is to ask somebody else at the field who had one. i do have to admit, they did a lousy job, and i am sorry you had such a hard time. the fact that your engine quit right at takeoff even makes it all worse, just knowing what happened to your repair.