RE: HobbyZone Super Cub LP...I hate it.
Try calling Horizon techSupport. If a real problem has crept into the model line, we should know about it. I have vigorously recommended this particular plane as it was recommended to me. Most of our new pilots learn on this plane as I did and love it.
If there is a problem HH may even replace it for free!
Give it a try and better luck in the future!