Board Thread:General Discussion/@comment-679780-20160723045230/@comment-679780-20160729193238

Two would be enough. There were two Sky Chases and two Tornado Defenses.

But I do like the idea of the one bi-plane that is highly customisable... ooh I like that idea, might add it to my own.

Like you can change the wings, the enginge, the propeller, add jets or additional parts and so on.