Could REALLY use some input from Solera owners on use of screen rooms. It seems that the Dometic Patty O'Room can't be used with the 9100 power awning, which I believe is the one on all Soleras. Does any one have experience with other screen rooms?? The measurement asked for on all rooms is "center of vertical arm to center of vertical arm" - this is 15 feet 6 inches on my Solera - should I choose a 16 foot screen room, or will this be saggy?? For longer stays, I'd really like to extend the living space. HELP!!