This is beta version of my 4×4 car. – powered by 1 nxt motor – 2 gears (1:1 and 1:2) – 2 differentials ( front, rear) located in the middle of car. power is transmitted by 16 Universal Joint to the all 4 wheels. – steering on front and rear wheels – no shock absorbers – remote controled by Wireless Controller (for Sony PlayStation 2 ) and PSP-Nx-v3 interface for NXT, from www.mindsensors.com I need to do a few changes on differentials and gears, need to reduce the size a little, and of …