Ive had mine running for 2 days and everything went great building it. I'm currently running a 13.5 in it and think its a little much. I think as a specific class for this style vehicle to run in a 17.5 would be great and keep racing close.
I put 5000 diff fluid in the rear and think its a bit to thick for the loose conditions I've been running on just in case any of you have thought about changing from the recommended grease.
The only problem I had with the truck is that i broke the chassis at the kick up. I hope i can get one soon.