[{tpc}]

Thanks for the link JRTJH! Seems pretty straightforward. Am I correct in thinking that the bulk of the weight of the topper would rest upon the brackets attached to the slide?

Like you said, I still don't know if the drip rail is attached to something solid. Even if the weight of the topper rests on the slide, there is probably one hell of a tension on that rail when the slide is out...not to mention any rain or stuff that might fall on it adding more.