I llooked forward in the instruction for a trim dimension for the flap root. In the final assembly section where the wing root fairings are added they say to trim the root end of the flap even with the inboard edge of the actuator parallel to the wing cord. I marked this out on the flap end and trimmed about an 1/8 longer to allow some adjustment later during final assembly. I wish I would have trimmed earlier as it would have made the A-Rib laminates easier (less depth).
I also made redrilled the actuator mounting holes through the new a-rib laminates. The upper panel actuator relief cut our was also made.