OK so I been racing 1/8th scale Nitro for a few years now. I've bought a Kyosho SC-R and I am ready to put ESC and motor together. I have narrowed it down to Tekin and Viper I know all about the Tekin series plenty of guys run them at my track, however I have no clue when it comes to Viper. Would someone tel me the difference between the VTX10 and the R or should I be waiting on the VX4. I am going to run an 8.5 motor if that matters. What sets the Viper apart from the others. I know probrally somewhere in these 235 pages you might have already covered it. I just don't want to read 235 pages of irrelevent information. Thanks