RE: Need a good combat plane plan...
Go to spadtothebone and look through the plans. I would go with the Saturday Night Midget but maybe make the wing 48". Maybe make the tail a couple of inches higher to add stability. The HOR is great combat plane. I used one last week in Open B. It will fly fine with a good .15. The Corostang is a really good flier as well but a little more work to build.
Hobby People has the Magnum .15 for $39.99 right now. Perfect for SSC.
Blessings, Terry