I realize that this is not a true canard but for lack of calling it anything else ---

The CG is about 5.3" back of the F1 engine mount former. Overall length of the 1/2A model is about 25.3" -- Firewall to vertical tip of rudder.

As far as the wobbleyness, under low power (gliding) it wants to swing back & forth. Left to right.

marwen1