North, basically there is a steering axle in the rear that is attached to an articulated joint. The rear axle also pivots to keep the tires on the ground. So you have one steering wheel, that turns everything, I am not exactly sure how it does it and I hope to get some video of the action, but I have been alone and no good way to get the video. This weekend I will have some help, so I should be able to get some video and better pictures.
500 pounds per tire, so I think the rating is 4500 per tire versus 5000. I am going to play with the clutch and see if I can adjust it, it may help the hole situation. Looking at some older pictures of the factory tires, it seems like they were bigger, but I have no idea how you would maneuver the thing on rough terrain with bigger tires, unless the clutch is the issue.
RM, I decided to just pull the plexiglass out for now, it was really bad and I would rather put effort into new glass of lean than trying to polish what was there.
Rich, I think the six lug was also used in trucks like the older F600s.