Quite a bit actually. All of the nutplates are put on with 426 3.5's or 4's and all of the hinges which of course is the entire cowling. You might also plan on using your countersinking equip. In fact, it almost seems like if there is attachment that a squeezer can reach it calls for a 426 or a 470. Otherwise of course you will be shooting approx 25000 blind rivets.