WINGS III Flaperon Hangers

During construction the III manual instructs to trim the top catstrip off the the ribs that support the flaperons, and then there is a Service Bulletin to add the aluminum support brackets. Why can't the catstrips remain untrimmed. It would seem that would maintain the added strength required. Anyone have any input on this? Are there issues with finishing the wing if left untrimmed?

The manual for my Super Sport has me do just as you suggest. Install the metal doublers under the capstrips (just make sure the doubler is up against the bottom of the capstrip).

Dick B