I have a Canadian Big Country, I was repairing a tank strap the other day and noticed the that it was tagged with 45 Imperial Gallons and a CSA tag. Can it be that we Canadians get bigger tanks. our Imperial gallon has 1.2 USG. That makes my tanks at 54USG for gray tanks and 90USG for the fresh water. I had to shore up the front gray tank because the angle was bending.