Gary,

Did you get the bi-directional strapping tape and apply per the instructions? I recently built a Predator and have been very impressed with its performance. I think it took too much work to build for a model with a short life expectency, but that may just be my opinion...

I too suggest that you call the guys at TufFlight. They were more than helpful when I called with building questions.

Cheers!

Galen