Between the time Joe Bridi first designed the Kaos and what we know today, we have made significant advances in our knowledge of aerodynamics and the availability of better and more powerful powerplants. The reason for the questions was that, I would like to incorporate some of those advances without running afoul of any classic pattern rules whoever makes them.

In control line stunt-my event, Classic for us is pre-1969, and you have to hold the original outline of the ship. They kind of play it pretty tight in stunt and in some cases, the guy in charge may have actually known the original designer,(we have a lot of old timers LOL) so you don't want to pull anything.

The sense I get is that I can whip up my Kaos,( I intend to scratch build it) and not to worry so much about it as in Control Line stunt. The CPA and SPA seem more like just good common sense. If my Kaos comes out looking like an Axiome, it ain't going to happen LOL. But if I change the airfoil but hold the outline, I should be good to go or, add a little more rudder because of the Kaos's famous "wiggle" problem, they'll know that' and I will be alright. Scratch building is more labor intensive and takes more time so, you want to be sure that what you make is good to go.