Made shims for rear-ribs # 1,3, 4, 6 to compensate for rear channel brackets to lay flat on rib. Because rear channel is sitting on flaperon support. The flaperon support is 5mm. to far forward on r-rib. Repair OK'd by Zenith. Worked on bracing spar& squaring r-ribs prior to channel installation. Cut 6-pcs. (7V6-3) 40mm long for use as channel brackets. Measured rear doubler for drilling. Deburred all parts.
