nickp, Being cheap is one of the best reasons to run LiPo! One battery per car and they last for years with virtually no degradation in performance. What could be cheaper than that?

In a way, the phrase "if it aint broke, don't fix it" does apply here. Given how fast an AE car wears out and how fast they are before they do AE has sold a ton of kits, in many cases multiple kits per racer (most AE racers I know go through two cars a year plus rebuild parts).