battery choices
 

i know lipos give gread run time but is it worth making a split pack to run n the front diffs ? COG reasons?"thumbsup" "thumbsup"

If your starting from scratch it's probably better to get the lipo, but if you don't wanna fork out the cash then yep, the split battery pack will give you lower COG than a stick pack. Remember, if you split a stick pack you'll need some battery bars, and a fair bit of heat: http://thecrawlpit.com/forum/viewtopic.php?t=4186 :-P