RE: Great planes ultimate 160
tater1,
Looking good, but I have a couple of comments. Ditch the stock fuel tank, you're carrying at least an extra 8oz of fuel that just isn't needed with the gas engine, a 14-16oz tank is plenty. The supplied tank was intended for a glow sucking engine. You might need the rudder servo in the tail of the plane for balance with the gas engine.
Chuck