Well it has been a while since posted here. I went back to a trans on it. I put the gmaxx single speed on flm half case. I modded the 4mm traxxas motor mount to accept the 2250 lehner. It seems to have fixed my cogging problem. It is not fast enough now.
Well the slipper does not seem to want to take the power. It keeps shearing the pins off on the pressure plates. I may have a fix for this later. I have tested it up to 26 cells so far. It is fair on speed with 26 cells. I may try to get a video later on.