Looks like it may be a better option to just fully replace my trimline bag awning. I measured the main beam...10 feet, 8 1/2 inches. Is that an 11' trimline awning? I'm guessing the extra 3.5 inches is the bag enclosure which has to be slightly bigger just to accommodate storing the whole awning... Ideally, I'd like to be sure to get the exact same one so that the ball socket things mounted on the camper will be already in the right place.