Buffed corners of W23-08 and -09 rib spacers and primed the contact surfaces.
Trimmed W15-02 inbd rear spar fwd fork fitting to make #5 rib and doubler fit correctly. Also needed to trim a bit of the rear spar web, or could have trimmed about 1/64 off the #5 rib/doubler assy. See before/after pics below.