Gday,
I had alot better results with the car this morning

. Much to my disgust, I returned to an Intellect 7.2v NiMh stick. It put on another 300 or so grams and now the car is a champion.
I think there are some lipos which have a hard case meant specifically for cars? I need one the same size as the NiMh pack and the same weight.
Here's a short vid of this mornings run at the dusty and rocky courts. Rear helmet cam,