I'm working on the tailcone kit. I've found that a lot of the blind rivets don't readily fit in the hole before they are pulled without some coaxing, wiggling, and pushing. I've clecoed everything up, deburred, and visually inspected. In some cases, I've had to run a round file in the hole a couple times and then it works fine. Am I doing something wrong? Or maybe it's normal procedure? Maybe it's because I've primed the interior surfaces and a thin ply of primer takes away just enough tolerance? What's the RV12 builders experience?