I ran into a bit of an issue with the W-1212 hinge brackets assembled on page 14-02 of the RV-12iS KAI. There are two AN426AD4-6 flush rivets on each bracket and the holes are countersunk on both sides for these two rivets. I tested my holes with the manufactured heads of the rivets and got them perfectly flush (my best countersinking job in this entire project), but when I squeezed the rivets the shop head isn't even close to flush. It's raised 0.025" on all 4 rivets. Has anyone else had this problem and what did you do?