> I would just flox it in the trailing edge, and bend as necessary.  The
question is:  what
type and thickness of AL, and any suggestions as to required sizing.
      TKS
      D. Story, ATP<

If you do decide to go with the fixed trim, I suggest that you make the tab
in two pieces to avoid excessive, unintentional stress on your rudder when
you are making the bending adjustments.
Flox a good stiff piece in to your rudder (about .080 thick and 3 to 4
inches long) and let it stick out aft of you rudder about 1/4 inch.  Make a
second bendable piece the same length by about 1 1/4 inch wide.  Attach the
second piece to the first with 3 small screws (#2 or #4).  Now, you can
remove the bendable piece from the airplane to bend it or replace it when
adjustments are made.  No danger of cracking your rudder in the process.
Bob Jude, N65BJ