You can follow my progress on one of my threads. "My Gecko Brushless Experiments" I am threw with the Mamba test and now I am working on mounting the 400 Feigao, all I need now is a 1/8" to 2.3mm shaft coupler. I have a straight 2.3 to 2.3 coupler so all I have to do is get one side drilled out to 1/8", but it has to be perfectly straight, there is no room for error. I am running BP1100 cells, sometimes 10 cells and I have tested the Mamba on 8 cells to try to reduce heat, because it was so fast it was uncontrolable anyway. So check out the thread I will be updating it as soon as I get the 400 in. There is a video of my Gecko with the Mamba 6800kv on 8 IP1100 cells. On 10 cells it was insane.