This morning I drilled the skin doublers & match drilled the right side outer skin to that pattern, primed the doublers & strengthening rib flange. All clecoed in place it was time to rivet & it appears to be OK. I opened up the required holes for rivnuts in the bottom flanges & also opened the original 3.2mm holes to 4.0mm for the bottom skin attach. Outer seat belt mount also attached.