It shouldn't rub the fuel filler hose if installed correctly. The bracket is not an issue. They don't have to be moved very far. Here's the installed pic from the rear. There are a bunch of other pics posted on our website at the following URL:
http://www.ststurbo.com/h2_installation_pictures
We are on the same page on the small rails. We'll get a stock one in here and take a look at it.
Thanks!
Ben