I had the chance to fly the prototype Cardinette some more and all I can say is that it just gets better every flight.

I flew it yesterday with the Surpass .26 and it was great.

It was very windy/gusty and there was never an issue with line tension or penetration. Even the windup was minimal.
If you have a strong .25, a Surpass .26 or, for super power, a SAITO .30, I would strongly recommend this plane.
There was recently some talk about going to smaller stunt planes - the Cardinette may well pave the way.
I will gladly offer assistance to anyone building one but since it is so straightforward, I doubt that any would be required - HAVE FUN!!
Bob Z.