This are trucks i used in Czech Lego Technic Truck Trial Championship 2008 (5 races) In final results I was 2nd.

All trucks are 6x6 with some diferences, some had lockable differentials, some gearbox... 

For more pics from racedays visit: 

http://www.brickshelf.com/cgi-bin/gallery.cgi?f=317792