He got it right. The adjustable poles stick out further with covers on compared to covers off if we're talking PAF style covers. They are always adjusted out to be level or above the cover. Otherwise they would be countersunk into the holes below the cover which I never see. When yo pull a cover the adjustable poles are always going to be sticking way out and will need screwed back in to a proper height. Now if you're talking covers with no holes that's another story.