Just went out to run the micro at 12:30 am and let me tell u this thing is fast! I could npt belive how fast this thing was. This makes my mini t look like its running a stock motor! The cool thing is I can control it even at that high of speed, 55+ guessing. I could not use full throttle I ran out of space in a hurry. I am useing stock plastic pinons so I can't wait tell I move up to more teeth! The guys at castle creations said to use Trinity pinons but I am useing stock plastic and they are working awsome, I wish I would have tryed them in the first place it would have saved me 60 bucks! What I would like to do it get it speed checked to know its real speed instead of guess but I know tonight it hit 50+ MPH! I have a video of a micro rs4 doing 50 with a 540 conversion in it, mine seems to be going quicker! I have my front diff locked, how would the car handle if I locked the rear diff also?