i wasnt sure what to get out of going to rs since i was looking for the laymans dual cell batteries but i knew they wouldnt have them...i did get alot of stuff going there, i had a convo with one clerk about the batteries and he thought it would totally nuke the motor and such (the 7.2 40mah batts) I did happen to buy the 50th anniversery corvette and im LOVING it. i totally love driftin it. but i forgot to ask about the tuning kit...what does it do??