Well about the only thing that I did to mine was added some 3/8 or 1/2 triangle stock to the stab at fuse (bottom) and stab at rudder (top). The fin won't take much banging around if you don't. Matter of fact. I have always stuck to this practice of adding a little reinforcement to the tail section. Hope this helps.

Good luck with this kit. It is a great bird and all around fun everyday flyer.

Chris