When I tried to install it I determined that I had installed the wrong nutplates
The flap handle nutplates have come up before (3 years ago now) where K1000-8 were installed instead of K1000-3. BigJohn did it and I did it, but BigJohns post saved me because I didn't have the floors in yet.
http://www.vansairforce.com/community/showthread.php?t=44769&highlight=21-05
If this is discovered after the ribs and floor panels are in, you could drill off the solid rivets with a small right angle drill and replace the nutplates using pulled rivets instead of solids.
Tony
You did this too huh? Interesting little job getting the correct ones in there.