I didn't have an extra tank added. I had a OME lift installed and they don't design a coil to compensate for sag. I believe it should level out with a 1/2" spacer just fine.
Found this the other day and thought I would share. I picked one up because I love the look and not a big fan of chrome. Looks like 3 left so if you want one get them while they're...
I believe I understand what you are saying. Ill see what measurements I end up with. I am just wondering if it would be worth leveling out. I do tow a camper from time to time and load the bed with various things as well.