I will let you know as soon as I fly it. I might just have to break down and put my skis on it. I am going to fuel it up and run it for awhile today to get the needles set. I live at such high altitude I am guessing its going to be rich on both. I didn't have any trouble with balance at all. The engine is mounted basically in the center of the rails so it could be moved about an inch in either direction with out problems. The leads on the ignition module are long enough I was able to mount it just ahead of the CG inside the wing to keep things clean looking. The tank is an 8 ounce.