The Cobra was designed by Dan Santich. His son, Steve Santich is a regular flyer at our club and good friend of mine. I've had the pleasure of seeing many of his old planes at Steve's home. Dan was the man when it came to RC design. A few years back I nearly took on the task of building the cobra - BUT- life happens...
Good luck with the build and I ask that you post a build of it. I'm sure Steve would love to see one of his late dad's planes come to life again!