Today a begun prosealing the ribs, I opted to do this in two steps. I prosealed the rib, then put a cleco in every hole (I even added a small nut between the cleco and the skin, it gives a bit of a better grip). I will let the proseal cure overnight and then rivet everything tomorrow.



Here is an inside view, tomorrow after the riveting I'll have to thoroughly check the flliet's integrity.