Hi Vince ...i fly with a cg about 15 mm in front of the wing tube. The M14 is NOT so sensible when it comes to cg, so i just place my slightly different weighing batteries in the same place.
However, in very windy conditions i try to push the batteries to the front because the directional stability increases by doing so. JM recommends CG 192 mm from the leading edge measured at wing root, and that is about where i fly it. At this point,cg =192, i have no trim on ailerons and no trim on elevators and i like the performance ......