A good STARTING POINT for the CG is 30% of the chord OR you can use the main spar (usually this is ABOUT right also ). I suggest making the plane SLIGHTLY nose heavy for the maiden flight - a sluggish plane is much better than a squirrely one on a maiden.

Since you are describing a fast, aerobatic plane, a reasonable STARTING POINT for throws is:

Ailerons and Elevator - Low rate 1/4" High rate 1/2"
Rudder - Low rate - 3/4" High rate 1"

These rates are to be used for the maiden flight at a REASONABLE SPEED, NOT FULL BORE.

Once you have completed the maiden flight you can adjust from there.

I prefer to use a conservative approach for something like this.