Well… maybe if you’re creative you can make a vertical rack between the rear seats that uses the crossbar mounts in the ceiling to stabilize it at the top. I recall 25 years ago, Europa selling a Gwagon on consignment that was owned by I think Hank Willam’s jr, and it had a rifle setup like that. I had pic of it in case I wanted to make one like it someday for my G. Of course, that was 5 laptops ago at least. No chance of me finding that.