Another lesson from the past
Back in 2005, on my 2002 Challenger, I noted that the 156" topper over the slide was always loose. In fact when I was on the Texas coast during that winter, I noticed a tear in the front edge of the topper (I fixed it with clear awning repair tape which is much like clear duct tape).
On further inspection I noted that three of the five screws mounting the front bracket to the slide wall were broken and the bracket was almost 1/8 " away from the side wall. Enough of that, says I. I decided to replace the 3/4" x #8 screws that AE says must be mounted into the frame of the slide - mine were not - they were just into the sidewall. I used 2 1/2" x 1/4" Stainless steel cap bolts (with locks, flats, and nuts) and mounted a 1/8" aluminum plate inside the front overhead cupboard in the slide. Using a bottle jack and a 2x4, I put pressure on the front arm of the bracket to align it with the original holes.
I could not use the three existing holes with the broken screw because the broken bit was still in the hole.
In any case, both my brackets are now solidly mounted in place with the bolts and plate.
Apr 05 Itasca Suncruiser 35U on Dec 04 W22 Chassis
All of the best and safe driving,