Thanks, man. I appreciate the pics, too. The take away is maybe more control unless you hit something hard enough to break parts and then it will cost me more to fix it. I think I want to have both types so I will buy a 94122 chassis with no engine as I have a spare motor. I need to learn how to tune next! Thanks to all who replied!
Good luck!
Also, you can upgrade just the radio tray on your 94102 to the 94122 version, which fits the receiver + batteries much more easily. All the screw posts are in the same place.