This kit is specifically designed for the TF2 with K10/K5 body. The main leaf is the absolute longest you can put under the TF2. Since the bodies are bigger we used all of the available room for a maximum performance set up. This is the "Lite" kit and this is perfect for 9.2-7.4lbs... the window is wide because your driving style plays a part. If your hard crawling you should have an AWB to protect you in bind up situ