I thought you guys might like this. The idea behind this conversion kit is, so you can run your electric cars on a 1/8 sized or a rough track. I know we have 1/8 4wd cars, but this is still 2wd.
http://www.ifmarworldchampion.com/
Here is a thread with pics from rctech .The conversion is the car in the middle.
http://www.rctech.net/forum/showthread.php?t=206146
PS the track in the video is my home track.