Unlucky for Tatsuo-san to scratch the car 🥲 But it's not a big scratch and can be easily fixed. And I can't wait to see your upgrades on the Every soon! By the way, both of you are so slim and toned. I wonder what exercises you usually do to keep your body figure good?
How about installing a foldable, rolling inside and outside table attaching at the interior side? Instead, attach a screen door at the rear hatch. Extend the internal to outside by attaching 3 full lengths of mosquito net onto the rear hatch (like the windscreen shade). As for the ventilation, I used to install a car aircon fan at the back of the driver's seat (Hyundai, H100). But it's still warm. It is still intake of the hot air from outside unless my van had to on the aircon (30 years ago).