Is there some rule of thumb as to how close to the rx the rx battery can be? Best rx battery for the spectrum AR 7000 using six DS 821 servos? Plane is a 1/4 scale BUSA Fokker D-VII. Zenoah G-26 for power and an optical kill switch attached to the gear servo location. Will be installing a 2700mAh NiMH for the ignition module. Have the standard 4.8v,1100mAh NiCd that came with the receiver and a 6v 1400mAh NiCd. Any help for this nubbie appreciated. John