Not sure about topping up to 73, then bleeding it down by driving it. It would take about 45 minutes to an hour of driving to do so. There is info on the tank decal about only going to 70 gal. That and the Father in law was/is a truck driver. He was telling me to make sure and leave headspace in the tank as a matter of normal operation. He has been doing it for 55 years, and me for 1000 miles, so who am I to argue?
Cowpig - Curious how many SF of deadener you started with. I can get it in lots of 36 square feet, and 18 square feet. Of course I could always measure, but thought I would ask you since you knocked yours out already. We are probably 4 to 6 months out before we can even start, so planning/budgeting for now.
