We are having a problem with our bedroom slide on our 2006 KZ Escalade. When the slide is closed, it is down about 1/4" on the outside. We took it into the local RV shop and they said the problem is...
Just based on the description and picture I'd be leery of of adding anything to the bottom. Someone might have a better idea but I'd be inclined to get it fixed correctly. As the slide collapses further more damage will occur at the opening.