Yep, I bent 2 shafts, the first one I straightened out like 3 times.

I ended up gettign an aluminum shaft and aluminum prop saver from aircraft world. Its a great little device as it saves your props from getting broke, and it saves you from replacing bent shafts.

I think mine was like 3 bucks for the sahft, 3 for the prop saver, and a couple bucks for extra o-rings.

Also, I noticed since Ive upgraded to teh lightweight shaft/prop saver and no longer use that rubber spinner, my plane is much quiter, a little more efficient (longer runtimes), and will hover better on the stock motor.