Fabbed two small angles to replace the ones I removed from the wingtip rib to prevent interference with the hinges. Got the fit wrong on the first, but was able to use it for the other wingtip and made the second correctly. Marked, drilled, deburred and match drilled to each wingtip rib. Gonna have to use the right angle drill to match drill the flanges to the wingtips in tight quarters. We'll see how that goes.