2016 30X3 slide issue

[jkbstingray]

Hi all, I've got a 2016 GT3 30X3. After a 3 year cross-country trip, we have put it up for sale. A potential buyer came and looked at it this week, and while looking at it they pointed out that the big slide when closed and viewed from the outside, fits tightly at the top but not so tight at the bottom. It looks like its stopping about 1/2" shy of the seal making contact. Is there an adjustment on this thing? I've never noticed it before and believe that it's something that just happened recently.

Thanks for your help!
Jeff