The whole concept of putting something outside the van to get wet with either rain or condensation or dew and then store it back inside the van doesn't appeal to me.
Please take a closer look at the photos, the slideout module protected
from the rain of by the opened rear door . The condensate is usually inside, so we keep the windows open. We are waking up not early than 8 o'clock , so dew is already drying up on the aluminum panel surface.
I never put the wet slideout back (although this summer was a lot of rain in Norway and Germany).
Thanks.
The slideout when pulled back does not require additional support arm, the weight of the adult will withstand calm (even sitting on the edge).
Calculated: The weight of the movable part is about 53 kg, the whole structure is about 102 kg.
But:
-It sounds strange, but the module was too long. When extended the bed is 250 cm in length, there is a lot. The module will have to be shortened to 190 cm, while the second seat row can be fitted with a refrigerator. Plus, the bearing rail will be shorter. The weight will be reduced, though not in principle.
-it has to be made back door (inside) easier and simpler. The door made an opening, with locks, gaskets. In fact, the door had never been required to be opened during travel. So it can be fixed.