Simon’s van is modelling a quick project made with a bit of scrap 1/8″ Lexan. The dimensions are 7.5″ X 17.5″, and the corners on one side cut out (about a 1″ radius). The idea is that the screen stops the rain from coming in the sliding window when it is opened for ventilation. To be field tested, I don’t know if I made it too long, it bulges out a fair bit.
Update: see here for improvement.
shooftie 