Notching is ok.
I would much prefer to rivet that rib sandwich together prior to mounting it to the tank skin. Dealing with the long rivets, sealant, and awkward location is a mess about to happen. This has worked on the 18 or so tanks Iíve delt with in the past.
Time to slow down the Builder Assist operation & concentrate on finishing my own stuff & fly the 6A.
My 'retirement' activities list;
Mon - 6 build project to finish
Tues - 6 upgrade project, canopy, panel, interior & fairings
Wed - 9A salvage rebuild, wing, firewall, gear, engine
Thurs - 7 salvage rebuild (was second plane I built, the Turbo Subie) for a buddy
Rest of week - belongs to the wife!