That's exactly what I did. NO rear windows. Single Seitz awning widow in the sliding door. Works great for me, even in the rain.Any thoughts about installing two fans in the roof, one in rear and one in forward part of cargo section, instead of installing side windows, for air circulation.
Not that I notice, but remember that the PM isn't whisper quiet even without fans or vents in the roof. I used MaxxAir fans and those covers can be open or closed when moving and also in the rain.Thanks for your response; it's encouraging. Do those vent covers on your roof cause any noticeable noise when at speed?