It's only attached to the trailer frame with the two lower bolts. The other four only hold the rubber seal in place. With the slide fully extended, see if anything is pushing it out from the inside. If not, what Cummins recommended is all there is to do. Remove it, straighten it and reinstall.
Leo and Janice
2007 MS 36 TK3 Glide Ride pin box
2012 GMC 3500HD D/A CC 4X4 DRW AirSafe Hitch