My 159 wb came with the factory rear fixed windows and fixed window on the slider door. I'm considering just adding a T-vent window behind the driver's seat and a fantastic fan. I have the factory partition with the sliding window. Will cracking the cockpit windows, opening the T-vent window and running the ceiling fan provide enough ventilation during a warm Summer night? My wife has not warmed up to the idea of leaving doors ajar at night for extra relief. Plan B is to spring for additional sliding windows in the quarter panels.