RE: Buiding pics Waco YMF-5 Barth Modellbau
Bernie,
One way to have the tab pivot in a scale fashion is to use a long hinge wire that can be inserted from the bottom of the rudder and go all the way through the tab and into the upper hinge position. Bend a little hook in the bottom end, put a little grove in the bottom of the rudder for the hook and glue in place. A little filler, touch of paint and it will be invisible.