Im quite certain i suggested this a while back but cant find it on the forum. Think it might have been during the kickstarter campaign.
I still think it would be a great idea to have a Demolition Derby type car or shell made up for RFX.
looks like something like this has been done before in the Scalextrics range.
The concept of racing and having parts flying off as you attach your opponents sounds great to me. When you have no body parts left on the car its gameover for the driver.