Hi there, First pop up we’ve owned. We have the awning, I measured the bag at 11’4” roughly so I think it’s an 11’ awning. I found a used 11’ add a room kit that I want to buy. I’m just not sure if there is more information that I have to confirm for fit aside from the length of the awning. Can I really just buy an 11’ add a room kit and pop it on my camper?