- Completed dimpling the few remaining rib holes. Just spread the flanges apart a little and used the vise-grip dimpler. - Dimpled and countersunk the rudder counterweight. Used a #20 C/S to countersink the weigh - just drilled down a little more. Used the #8 dimpler to dimple the rib, and squeezed it a bit more as well. Not perfect, but "close enough". Next thing to order - #10 dimple die set and C/S!