Having built and flown KAOSs for more than 25 years now (still have 4 of them), I would agree that it is one of the best flying basic pattern planes in the world. However, I would suggest a 60 instead of a 45, if you want any kind of vertical performance. You can get the Killer Kaos from http://www.bridiairplanes.com/. I have one in the box I am getting ready to build (with conventional retracts).

John