It is a 4wd rock crawler and also has 4ws. It is driven by two XL Motors and a PF Servo Motor for steering. I got some ideas from 9398 rock crawler and from Nico 71's rock crawler. It is very powerful and fun to drive around. In the LDD the colours are differnt and the PF Servo Motor is there. Lots of pieces are next to the Model, the did not want to fit and so on. If you do not know where to put that piece just ask.