Yes, it can crawl 
http://www.youtube.com/watch?v=w_F7QrR4Ur8
I think he should enter the top truck challange so we can really see what it's got. Like posted above I think the biggest dissadvantage is how long it takes to control every part of the vehicle. Maybe if he had a computer controlled leveling sensor he wouldn't have to worry so much about his hydraulic controls. It's a good concept but still needs lots of tweaking.
