We are two months in and our loving our 2018 JLU Sahara. We just did our first longer road trip to Death Valley (highly recommend). It was awesome except after a few hours of normal roads my wife said her lower back was in big pain. I was doing most of the driving and she was in the passenger seat this time. It was certainly a bummer and even a bigger bummer when she suggested we might have to get a different vehicle. This happened a few times on the trip after several hours. Are there any suggestions for improving the seat situation? Cushions? Lumbar support devices?