After coming to the belief that my trackstar had died this buggy had been sitting on the shelf for quite a while now. However I never bothered to send it in for warranty, and the other day I just tried plugging it in for the sake of it. Too my surprise it fired up. Although it didn't last long, it only fired up on 2s or 3s, but as soon as you plugged in 5s it would die. So I pulled it all apart thinking I might have a bad solder joint somewhere, or something like that. Instead I found the caps were in pretty bad shape. 2 out of the 3 were bulging at the end. So into the toolbox I went and found two dead 70amp Suppo/HK plane escs, both with 3x 370uf 35v caps on them that looked in good order. Considering the trackstar had 480uf caps on it (from memory), I didn't know if just the three smaller caps would be enough, but removed the old caps, and soldered on 3 newly donated ones in the original place on the board. It worked, the new caps fixed the 5s problem and it seemed back to normal.
As I said before though I wasn't sure if the new smaller caps would be enough, so I made a little cap bank with the remaining three with a bit of delrin sheet and soldered that on. The total of 6 smaller caps ended up giving an extra 780uf capacitance, so hopefully that should smooth out the ripple voltage a little also.
Now apart from the new and improved ESC, the car got a new body. It's an old axial xc1 from my old rock crawler that I trimmed to fit the hyper. Fits well in my opinion and is something different from most. I've got got to make up the rear mounts and it's good to go.
Kieren