By the way, it's been a while since I visited this thread and I can't remember what I've said already.

For those considering buying the model I very strongly suggest you stick with the recommended power. A very large part of the problems I'm having are due to not being able to balance the model because I used a YS .91. The only way I'll get the model to balance with that engine is to put lead in the tail or perform surgery to move the battery way back.

That's another stopping block for me because I already don't like the model and I don't really have the right engine for it. I have to decide if I really believe paying another $250 or more for the "right" engine will make all the difference with this model.

I have seen the videos of the model in flight and I believe the model is powered with the YS .63. It flies much better than I could pilot it. I'm not an "accomplished aerobatic pilot."