For today's rib, I mixed 44 grams (40+4) proseal. It was just barely enough. Same drill. Tape lines along the rib to dress up the proseal when complete (plus I have to say it helps cleanup faster so you don't have to remove so many smudges). On the non-rivet side of the rib, I tape 1/4 inch away from the rib. On the rivet side of the rib I tape1/8 inch away from flange. The rib tip is narrower than the rest of the rib flange so I just keep the tape in a straignt line, giving more exposure at the tip. That's ok because you want to goop up that tip area anyways. Being retired, I seem to be a slow starter and don't get out to the garage before 10-11AM. Giving myself two hours to work, another hour to clean up and it's time to stop and do school carpool task. I need to find a way to get more time out there. I guess I will try to start at 8-9AM and stop at 2pm and see how that works.