I have trim servos for the other 2 axis, but wanted to stay basic for the rudder.  I've been told that there is enough friction in the rudder cables, that trim isn't necessary?  But I think a small fixed aluminum tab on the rudder wouldn't hurt anything.  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