just about to pickup my hitec servos for the ucd and noticed that they are rated different (torque and speed) based on the battery pack used (4.8 v 6.0). I'm new to this so can I just go out and buy a 5 cell NiMH at 6.0 and plug everything in? Or do I need a special receiver etc? I'm using a hitec 7ch receiver and a futaba 9ca tx...

thx