I got an opportunity to use the bucking blocks I purchased the other day. Brent Owens master rivet bucker came over at 0700 and woek me up (I had the alarm set for 0630, but had a Sun-n-Fun hangover). We installed the nutplates for the wingfold option. I had to use a corner plate as I already riveted per layout on the skins. They use one of the adjacent holes for the nutplate in the CAC, but you have to to this BEFORE you drill to #30 your forward spar. Brent also bucked the rivets it took to put in the fuel pump doubler and tripler for my countersunk screws I used on the pump intall. It came out well thank you Mr Owens!