Lots of proseal today. For the ribs, drain valve and fuel cap on 1 tank I used 100 grams of part A and 17 grams of part B. Nearly zero waste when I was complete. I had lots of prep. First, tape off everything possible. Second, scuff and sclean the mating surfaces. Third, mix and apply proseal while progresively riveting. Not all that hard, but 2.7 hours for something that should have taken 20 minutes if it didn't require proseal. I'll work on the rest when I get back.