Mark

Speaking of the CG,

Akiba san's CG is exactly 113mm from lower wing leading edge.
BJ 's favorite CG is 120mm, cause he likes to fly closer and slowly.
The above two Korean guys CG are 110mm, and 115mm. just take these CG for your information only.
You can move your battery to the backward all the way.. so that you can feel how the performance is changing at each points.

BJ said, Passion has strong HTVC so, if you move your battery to backward, the elevator trim won't be change that much.
Have a nice flying with Passion.

Sungho