Hi all
Well i followed Alfredbmor's lead and before comitting to servo placement, checked the cg with the engine, tank, and servos in place.
And to my surprise at a cg of 3 & 7/8 from leading edge, it balanced with the battery at mid cockpit and thats with the rudder servo in tail location,and one elevator servo in cockpit, throttle servo in recommeded location.
If tail heavy i was planning on mounting the battery on top of the tank inspection cover plate.

Im not sure why some have had it come out tail heavy
The instructions mention if using a O.S 46 fx engine,
which is exactly what im using, to place the battery in front of the fuel tank. That was not needed on mine??