I think you might get your wish on the shell
I'd have thought a 36 would be too hard especially give the low power and racing through the night. I'd like to see 3 sets of 32s allowed last year it wasn't the ware that was the issue it was the sidewalls tearing apart that was the problem.
Don't have a problem with fast change battery systems and the like, to be honest some of the ones I saw last year looked like they caused more problems than they solved...
Last years Doris car was pretty standard apart from screws, nuts, springs and a few shims here and there. All the cars were checked over by John before the start of the event and a few more times during the race
Jason