I have sea plane doors, left and right) on my PA-12 ( which by the way I'm slowly beginning to master) With the air stream coming into the cockpit on both sides would I be in danger of blowing out the greenhouse on the overheard or causing an excessive pressure condition on the fabric. I don't know what the PSI difference is from closed to open door,but I'm willing to bet it's an eye opener. I have pneumatic pistons that hold the doors open on the ground (one piece unit left and right) it's a big door! I've had the right hand door open in flight at 115 MPH and it's IMPRESSIVE! My wife, the white knuckler, is neither pleased nor impressed. I 'd love to fly it at around 80 mph with both doors open, but I don't know if that would be prudent.