I have just converted my nitro HBD8 to electric. I used the teko rc kit for the conversion and the mamba monster ES and 2650 KV moter. I have a 14t clutch bell on it and I am using 2 zippy 5000 mah 2s 20C lipos connected in series. I have yet to run it on our local track. I wanted to know some good gearing option as far as clutcj bell and spur gear. I want it to be ast and powerfull with out me frying the batteies or engine.