[EricH]

For clarification: Let's define a coordinate frame with the z-axis pointing straight up from the floor and the x and y axes pointing horizontally. Does it pivot about the z-axis or the x/y axis?

If your answer is z-axis, you'll have to have a rigid frame perimeter to mount the bumpers on that is non-articulating (<R11>); have that and you should be legal.

If your answer is x/y axis, same thing--rigid frame perimeter, non-articulating, all that good stuff. You'll need to take some extra care to make sure that the bumpers stay in the bumper zone (10-16" above the floor) unless you're going over the bump, but you should be OK.

You'll also have to watch out for <G30>, but some careful planning should give you no problems there.