On this second session, I clecoed all the ribs back onto the tank skin. Then I removed L6 rib, cleaned and MEK'd in preparation to proseal. I buttered up the rib flange and clecoed it back in position and started riveting from the nose end back towards the aft. I measured 40 grams of proseal which turned out to be too much. I also decided to purchase a new scale with better resolution. The current scale only measures whole units of grams, so I can be off by 1 gram which is a lot when only weighing out about 3 grams of part B and 30 grams of part A