i too would vouch for BK - berescoe is correct in his apprasial of character.
sponsored drivers have a vested interest in running good gear, it is what will keep them at the front and hence sponsored... you dont see the hx team running the cen cars? now they would probably do a very good job of butt kicking if they did.
if someone is a better driver and gets sponsored good luck to them, and the only ones i have met have been very helpful and friendly.
bloddy bigpond users
as for batteries i store my 3000hv's with 1500mah discharge the night before use and charge at 4.5a. but i generally dont do so good at big events (or little ones

) so perhaps my advice is not worth the pixels its printed on!