The louvered vent in the main bulkhead went in last Saturday, and took less than an hour. I secured the vent in place by screwing four brass screws in from the forepeak side. It looks great and although the airflow is less than I expected, it does work.If you try this yourself, cut through the bulkhead from the forepeak, and not from the main cabin like I did. That way the ragged edges of the cut will be covered by the louver frame. The opening port in the cockpit footwell will have to wait until I finish fixing my trailer.PeterS/V Raven