I just purchased a used 2004 Chalet Arrowhead and on our first trip I noticed that there's a bit of a gap between the roof and the wall on 2 of the 4 vertical lines of the roof. I emailed Chalet and they sent me a $75 part to purchase, but I'm not sure that the gasket is the issue here. We didn't experience any leaking even though it rained a bit while we were camping this past weekend. Note that the gap disappears as you get higher up towards the roof. This is the case for the opposite corner as well. I'm wondering if there's a trick or something I need to to to better secure the wall and the roof, or if this kind of gap is fine and there's nothing to worry about. Let me know your thoughts based on the picture. Thanks!