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averys has an oops rivet kit it comes with two sizes in three lenght i use the large size to fix bad number 3 holes and the small size to attach nut plates were the skin is thinner then .032 you can cut the counter skin by hand the head is so small on the rivet, files to clean the edges of the skin, i use a 1/4 drill bit to debur holes, some short clecos if you have a longeron yoke you can squeeze rivets over the cleco, a dimple set that uses a pop rivetter to create the dimple, a good fluting plyers. i like a countersink stop that has a small diameter as often there is something next to the hole that gets in the way, if you have a way to get a thick heavy chunk of steel use it to back rivet on. i like the vicegrip clamps that are built on a vicegrip plyers frame, you will either grind the edge off a dimple die to get in a corner or else buy the small diameter female die, 6 inch 12 inch rulers and larger, round files to clean up corners and move holes, i find uses for a few 1/16 inch clecos and a few extra long clecos, some fine thread nuts to temperarily hold your bolts, cut a few screws to temperarily hold nut plates in place without getting into the lock portion of the nut plate,