So I pulled the tigger on some of those Rain Blades window rain guards. It gets awfully stuffy in the van with the windows closed even when the top is popped up and the windows in the canvas are open...
I also have the weathertech. We also have some screens that slip over the top of the door so we can leave the windows open a couple of inches when it's raining, even in buggy areas.
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Roger
Vent Visor is another well-known brand--I've used them on 4 different E-Series so far. They might no longer be a stand alone company but the design is pretty timeless through the years.