I took a look at the new drives for the Summit, can't tell if they're still plastic or if they're steel- but it looks like still plastic- what we REALLY NEED is a larger version of THESE:
http://www3.towerhobbies.com/cgi-bin...&I=LXUUA9&p=ML
Then again I'm also waiting for someone to step up to the plate and make ACTUAL BELTED tires, I'm not holding my breath.