I have been flying my Raptors with an A123 2300 RX pack and all is good, I love the Hitec system. My question is about a new 90 size H9 P51. I have a 1650ma NiMH 4 cell pack installed. I have low current servos (non digital) in the plane but I do have 2 JR 4721 servos. Will I have any problems using a 4 cell pack? I have an A123 pack for the plane but the JR 4721's do not work well at the higher voltage.