gulfstreamI you can’t flip it upside down because the angle of the steering arms is too great and does not work properly no matter how much you try to adjust them. Plain and simple it won’t work with the stock remote. Like I said I worked on it for quite a while trying to make it work and had two different hobby shops work on it and the long and short is if you plan on putting modern electronics in this buggy due to the way the transmitter sends its signal and the way the servo has to be mounted just doesn’t work together so a new transmitter is needed for this mod. As far as the battery goes everything was the way it was when you sent it and if you actually paid attention to what you did you would have seen that the servo was operating the wrong way and the battery was a standard radio shack golden arrow battery so whatever mods you did just didn’t work together and that’s ok.