If you're referring to the T-Rex model. We've already established that model has issues. If you look further back in the discussion Scott has been wonderful in posting some awesome changes to get the T-Rex model to fly like the real one does. I fly it for practice for my Blade 400. Its pretty darn close. Only bummer thing is, the computer sim can't account for the pucker factor. I can practice all I want on the sim, but when I go to fly it outside, it can make ya so nervous you pucker up