Tad,
When you remove the tank, you will see a guide post with a rubber bushing on each side of the frame. On the under side of the tank you will see metal flanges that engage these posts when you install the tank. It is possible to install the tank without these things lining up, then the first time you turn the bars (or they flop over) they hit the tank and dent it. I know no one else but me ever did this

, but I thought I'd let you know about it....
Oh, and when you remove the hose from the petcock, stick a golf tee in it to plug it.....