Have you tried to store a child seat in the frunk? Not a baby sized seat, but for 2-3 yr old...where the seat has a bottom, and connected upright back... im anticipating having this seat in my car like normal, but having to store it in frunk from time to time if I have extra adults in the car, and kids in the way back. Especially during summer, I don't think the jump seats will be standard spot for both kids. Not a deal breaker if it can't fit...but I was just wondering if others have tried. Thanks. also, do your kids use the jump seats exclusively, or trade off into the regular back seat as well?