Got the 580 and flew it about a dozen times before I put it in. I'm off to buy my second, nice thing about it is at around $40.00, you can be a little more daring (and learning) with these Flatouts. Put the Rimfire in it with a 1000mah LiPol battery and after a good charge on it, it liked to rip the plane out of my hand with so much power.
What a great plane just to have fun with. If your fast and hard on the stick, yes you'll flex the wings and possibly pull too many G's in flight to damage it. Just watch your throttle and your throws. Landings can be damaging as in any aircraft that comes in too hard and fast, (how my demise came about). Would not recommend flying in the school yard with blacktop, better a nice field with grass to soften the landings. It is light, even tough the Rimfire setup I put in gave it enough power, watch the wind.
I am not a foamy fan, had several GWS's and would not buy another, but this plane I really had a blast with and as I stated above will be buying another. Plan on moving my electrical's (servo, motor, reciever) over to the new plane. Might repair old number 1 aircraft and install factory supplied motor and let the "Phoenix" rise again.
Would recommend this plane and motor setup (Rimfire and LiPol) and have a blast with these.
Oh Yeah, anyone who's built a foamy knows, "Foam Safe CA and Accelerator Spray" is the only way to go. If not be prepared to have a lot of Hobbico Light Weight Filler, it's also foam safe, (for the holes not using Foam Safe Glue).

Have Fun