Follow-Up:
I don't know why they would only endorse a Carefree when my Winnebago dealer only carries Fiamma and only recommends Fiamma. My F-45 Plus is 11'6", fits perfectly, takes one person about one minute to raise weighs less than 70lbs including the case mounted on the side wall and costs $625 installed. You can also get a screen room kit that matched up perfectly for about $600.