Project 1 complete.
This used 1998 came with a variety of problems. One was the entry step. When you step on it, it would move down. The entire step "box" that the outside steps are attached to would move. Inspection showed a large gap between the box and the side wall of the RV.
Solution, remove the expando-foam, place a piece of strong angle iron under the front edge. Secured with carriage bolts.
Problem was, the body below the door was hollow. Just fiberglass.
So, put a piece of steel on the outside to reinforce it.
Steps now rock solid.
Project 1 completed.