First , let me thank Ken and Drew to pointing me out about the 28" scale problems for the High G.
After extensive research and discussing with the luthiers ,I went with Multiscale option ,and the new scale is 27" to 24,5".
This gives me the possibility to go with a 008 on high G ,and 66 for the Low A.
The truss-rod is installed but the Carbon not. So it will take time to finsih this baby.