Mike...Mike Mike Mike....Your drifting again...LOL Dennis was correct is his observation that the direction of travel in my drawing would make the airflow keep the door closed or impede the drop. Much like your #2 drawing, only reverse the direction of travel. Your #1 drawing is very interesting to me, in that it looks more like the real thing. Could you elaborate on the technical details of creating functional "bombay"style doors? And as always Minn, Thanks for being an excellent source of information and a great resource to the RC and RCU communities.[8D]