I'm building one Widebody 60, and I will appreciate your inputs

My main concern is to keep it lite for 3D

CG questions:
Is it tail heavy?
Can I mount one mini-servo or better two at the tail for elevators?
Can I move the tank to the CG?

I'm thinking to mount the Hinges at the center, any comments?
Any suggestion about mods for reinforcement or to make it lighter?

I'm planing to use a YS 80ST3 Heli that I adapted for flying, it is about 3 to 4 Oz lighter than the OS 91 FX with standard muffler and the throttle response is awesome!

By the way, does it fly as good as the kit seems?