I think I figured this out, but welcome feedback/comments. First, the brass contact sticks pretty far out, which will make the center contact roller set not seat flush with all 3 rails. Second, the screw is too tall by almost 1/16 inch, which creates the same issue of not seating flush across the 3 rails. You can see by the photo, the hotel room key card as a straight edge shows the screw head sticks up too far. So, the solution is to bend the brass contact more even with the bottom of the roller housing and then to grind the screw head down using a dremel tool to eliminate the high spot, making the whole roller set seat flush across all 3 rails.
Mike
