Well I took it out again last night and again broke something. I went through another 3 tanks and it ran great and seemed to be working well. I was running it on smooth pavement and was doing a lot of 180's then I did a few donuts and it just stopped. Turns out my differential is messed up. Not sure what yet, but I'm sure it's pretty well ruined. I'm getting ready to take it apart right now to try to see what happened. I do think I'm pretty hard on these cars, but I thought they would be able to take it. Especially an off-road buggy. I might snap some pics when I get it apart and see if you guys can help me diagnose.