Found these on Youtube, and even with dial up they are well worth the wait, showing why you've got to love the Scammel (axle articulation), Kraz?, and Mud, Mud, MUD
http://au.youtube.com/watch?v=z3UY2i...eature=related
More of the same, including ferret and Centurion (ARV?)
http://au.youtube.com/watch?v=hdLJTC...eature=related
Sugga, Half track, 8x8
http://au.youtube.com/watch?v=heICakyN4Wg&NR=1
If the links do not work, search youtube for "Heavy Vehicle trials"
Rich