Removed rear spar from jig. Primed all ribs and re-primed front spar center section where HS-814s had been re-filed. Drilled, clecoed and riveted ribs to rear spar. Drilled out and re-riveted one flush rivet in spar channel (See 26 Jan 02). Remounted rear spar into jig. Clamped front spar onto ribs. Measured and aligned all components; marked rib flange centerlines; test-fit skins; drilled and clecoed HS-607 ribs to front spar. The skins fit like a glove -- the flange centerline marks lined up precisely with the holes! Sweet.