to true about the batteries being expensive,i had 8 set of scrce's 1700 from phil booth and they cost me well over £300 and could only be charged once a day, so yes lipos in the long run are the cheapest option, and to get my car to last i used to run 64dp gearing so the gear ratios were closer together, but the cars are now so fast that a lot of people lack talent because they think a quick car will make them a better driver, its took me a while to learn to drive on lipos but its coming.