I have change some set up, finally I am able to take the jump in front of the driver stand from 2+2 to 3+1, just like how I would drive a 4WD. Now I just need to tune for abit more on power steering. Franky, you should try the rear motor config, I think it's better all round. http://www.youtube.com/watch?v=xM0Mm4vQWJA
Enjoy!