RE: Center of gravity
Hey Neuroza
One of the most important things to consider is the direction and throw of your control surfaces. If you get the aileron throws backwards, you won't get past the first turn.
If you are standing behind the plane, push the aileron stick to the right. The right aileron should go up and the left aileron should go down.
The throws of each control surface should be maybe a little less than half of the total. To much throw and you will over control right into the ground.
Maybe some others on the board could expand on begining throws for the plane you have Pictured.
By the way, where did you get the plans, I might like to build one to bump around with
Brett