Help, I'm a rookie dad, trying to help a rookie son get set up for racing. We just got a Mill Pro, it comes with 5 preset profiles. We are using NiMH GP3300 packs. The NiMH 6 cell profile is 4amps, is this high enough? I keep hereing folks say that you need 5-5.5amps? Also I thought that looking at other peoples read outs on there Mill Pro, that it showed milliamp hours while charging, this one seems to only show it after charging. Any good tips would be appreciated.