The problem is the angle stays the same as the steps are expanded/contracted and is totally independent of the angle in relationship to the platform. I've tried to think of a solution that would keep the angle the same but haven't figured out one that would still allow the steps to be expanded/contracted.
My solution was a 2-step flip down design which I later changed to a 3-step design. The 2 step was 11" each step but allowed the rear door to be opened with the steps flipped up and was held up by it's own weight. The 3 step design was necessary with a newer truck which was 3" taller and held up with two springs, only problem being that it blocks the door so must be flipped down to enter the camper. Both were mounted on a simple 18" hitch extension because my camper stops at the back of my bumper. However, I wouldn't have a hesitation to put it on a slightly longer extension for a 9-6" camper.
Here are the pics of the 2 step design. I can post pics of the 3 step design if you would like.
