Hi,
This year I put new hiking straps on my tramp and when I put the tramp back in I used some plastic gizmos called Trentec Tramp Clamps. They are sold through Hobie and are good for securing the tramp in the aluminum castings and prevent slippage in worn areas. They are also suppossed to tighten the tramp up some which is a good thing almost always. If you are concerned about the tramp dipping down too much, they might be a good addition.