ORIGINAL: BigSky
Just to clarify the battery issue, from the pics that are posted the pack in question is a standard 4 cell Futaba NR4J 4.8v / 600mah. This would in fact peak at about 5.65v. But hey I'm no battery expert.
That's why I specified a 6 volt pack, since he referenced 5.9 volts. I would say your 5.65v on 4.8v pack is pretty close =/-.
P.S. I'm no battery expert either!