actually, we don't have pterodactyl DNA really. If we did we would've cloned one a while ago. With time, DNA breaks up. Dinosaur DNA is too broken up for us to currently work with. Also, don't mechanical arms have slower reaction times? Also I've seen that they're also pretty clumsy and slow. Wings would have to be flapping somewhat fast (depending on the size of the wing) to be flying. If our pseudo-wings were as good as mechanical arms, they would be as I had said before, death weight.