I've been guessing about the battery pack. They were originally offered with 40,60, and 85kwh battery packs. All the same wheelbase and they are offering battery swap capabilities, so I'm guessing that it is a battery compartment that fits three different size batteries. That leaves me thinking that 10" might be easy to remove, losing the 85kwh battery option. There is a guy who is putting a strtched VW Vanagon on an S chassis. I'm going to have a look at how he's doing.