My topper has solid side windows and I don't have air conditioning. I can't really take the top off (security) plus my business is advertised on the windows. I am considering either a vent type (square as seen on alot of ram chargers) or a moon roof I can pop up and let some of that hot air out (truck is black). Has anyone installed this type of vent or sunroof in their topper? How hard, what costs, did it work to get air for people riding in the back (as well as letting the rear window down). Driving your blazer=FUN!