I will need 2 battery pack 4.8v (1500mam ignition+1100mamp servos) in my plane. I going to try to find out the lightest in the market. Those battery pack will add some weight in the nose.
Let me know if you know some light battery manufacturers.

Mayur and you gave me nice idea with the MK bellcrank for elevator. I have not decided yet if I will use a standard metal pushrod between the servo and the elevator horn or the bellcrank system. Perhaps the MK bellcrank is better for aerobatic performance??? I dont' like carbon rod for elevator. it's not enough strong. Probably the metal-wood-metal rods with MK bellcrank.
http://www.gatorrc.com/

It is impossible for me to estimate the future CG position because i am building it now. I am confident being able to move my CG to the right place by:
1)installing the engine first and after,
2)install the servo and finnally
3) the battery pack to get the CG to the wing tube.

Punch holes in the turtle deck too? The holes are a good idea, as long as they dont compromise the structural integrity of the plane.
I agree with your comments.

This plane requires a few engineering to build it right, that's why i like it!

I'll let you know


Scou