Below talked about the Hydro doors coming open a bit. Have a buddy that had Hydroswing change out the valve to fix the problem. He said did not fix the problem. He has a neighbor with a Power lift door does the same thing.
 Check out  www.icondoors.com  This company started with a several employees from Hydroswing that started there own door company. Looks like from the web sight they changed a few things. I might give them a call and see if they figured out how to keep the door from coming open at times.