Do you envision the plastic shell rotating? If so, how would you make it clear that it is rotating without scratching it up too much?
If thought about it, but I am not sure how to make it work with the motion base and it still be safe (IE the sphere not jumping out of the cradle). I don't think it's really necessary and that it would probably be more trouble than it worth, my current plan would be to hide the seams of the hatch at the floor and on the edges with the side support rings so it doesn't seem static. If you have any ideas is be open to suggestions!
Also now tht I'm thinking about a trackless system may not even be necessary