I have the motor esc and batteries already, I bought them for the black "cheetah" I posted on this thread a while ago, I just need to buy the conversion, I can get 2x 8s 5000mah batteries in the battery box, run time was roughly 30mins though not flat out all the time, I now have bought a 10s 10,000mah and a 12s 8000 mah battery, these are the biggest batteries I can physically get in the box, not sure what damage will be done on them batteries though