this would be truely awesome, BT cars to race ya mate indoors as people have mentioned BT range will kill the fun on larger scale cars, the best size would be 1/32th like an x-mod or losi mini etc,
i ws planning on making one at a learnin project but my downside is that it's been years since i messed with rc's an electronics (other than using gadgets)an i am absolutely crap an coding (bash scripts are hard enough) but all that aside i'd still give it a go