Hi, I've got a TA-04R and it's plenty fast for me. Its easy to tweak, and from my experience, nice and strong. I've only broke one thing, and that was a front axle after a nasty high speed crash into a tool box. doh! I found that when I set it up out of the box, it exhibited quite a bit of oversteer, but after buying some harder springs for the front, it's pretty balanced now. I raced on carpet, indoors, using foams. Oh, and the diff's are pretty open, so outdoors racing is risky unless the track is nice a clear of stones.