Finish countersinking the skin and rib attach holes, Countersink and install the tank skin platenuts, then countersink for the tank screws. There was a buzz on Matronics list about countersinking the tank screw holes, so I was a bit worried. followed the plan steps and No Problemo.
a few MS 21053 L08's get installed
Then the K1100-08's 56 ea spar
Make a #8 test dimple and countersink the screw holes
