Originally Posted by Subaru297
Set screws were at the top of the bracket. I initially installed the brackets vertically and during the first trip they tilted until the cross bolts were against the top and bottom of the frame. Bottom of the bracket pulled forward.
After that initial tilting they didn't move again.
Andersen must have changed something at some point as ours cannot have the brackets installed vertically. They are designed so that they only go on at angle.