That doesn't work, First of all none I've seen open 90 degrees, but even if they did you'd have a huge sail area pushing against your refrigerator you don't want pushed against, while eating up your battery. This is why I said it's not designed to be used the way working pickups are used, where most of the stuff going in and out of the bed don't go through the tailgate but over the side. Especially tools and small frequently used items. I'm sure he'll sell a lot of them to be used for recreation, profiling, camping, and commuting, but they are not practical for working. Tough mounting tool boxes on the slope.