A 45lb wing is way too big for a single tank. Here's what works for me;
Fresh water- 30lb wing, HP119 steel tank, 1.5mm shorty, AL plate, I need no additional weight.
Fresh water- 30lb wing, HP119 steel tank, 5mm full suit, AL plate, I need 4lbs on the belt.
Fresh water- 30lb wing, HP119...