I recently picked up my 29FBH-S (fifth wheel) and it has the floor vents for the heat. There's not much airflow from the vents towards the front of the trailer. I opened up the panel in the outside storage area at the front of the trailer to take a look. The tube feeding the upper duct appears to be ok and there appears to be no leaks. Do other people experience this with the Outback fifth wheels? The two vents in the living area have too much airflow so I was thinking of replacing the registers with adjustable ones to control the airflow.