Ok guys looking for help. I just began my project and when riveting the rear spar bars to the spar channel the plans state to use rivet AN470ad4-6. It appears that this rivet is short. I set the rivet and used the gauge and it fits for the -3 but not -4. Am I doing something wrong or am I measuring wrong. The plans specifically state that the rivet call out is correct (as if they know that this will be questioned. It seemed to be the same way when I set the VA 146 rivets as well. Please help.