Setting rivnuts in the center fuselage (CF) area had been on the TODO list for a long time, but it took until now for me to summon up the nerve to actually do the deed. It turned out to be rather easy. I was in the right frame of mind and it all went very well.
A few of the rivnuts are in locations where I couldn’t use my drill-mounted (Astro ADN14) setting tool – particularly one of the M4’s for the A/P bracket nearest the main spar, and two M5’s that will serve to anchor the rudder return springs to the rear spar carry-through member. Fortunately, I’d acquired a nice hand tool (Astro 1443B) and it worked brilliantly for those. Concern about these rivets were what kept me dragging my feet until I’d worked up my courage to attempt the work.
Each of the holes where a rivnut goes, were enlarged to the proper size. This takes several steps, but it’s the same process I’ve used elsewhere. In places where I can’t see the back side of the mounted rivut, I use a mirror to inspect the crimp. They all looked great.
Various panels and covers in the CF that need to be removable, now have their mountings in place.