Trey,
SSC is a great class. It's easy enough for beginners to fly, yet fast enough for the long-time, battle-hardened fliers like Kirk. Open B is very fast (90 mph). Too fast to be any fun for me.
I believe the Battle Axe was the first combat plane Dave built. One ounce over min weight is as close as you want to come. Most planes are about 1-4 ounces over.
We rcommend the OS LA15 because is is a durable, easy to use engine and the needle valve is not right next to the prop. Although the OS is far more poular among combat fliers, a lot of pilots, such as Dave and Kirk use the Magnum .15s very successfully.
The engine-mount holes on the Battle Axe are pre-drilled for the OS LA15. When using a magnum .15 you can use the existing rear holes and drill new front holes if required.