Here's another thought.

I'm real sure this would be hard to fill. With the smaller tank bottom bellow the main tank....but filling the main tank. Will this work? Also...piping from one to the other....what size neck and hose would you guys use. The hose will have to be fuel safe. 2"? 3"? I can use 2"X 30" aluminum pipe between the two....with short rubber pieces at the ends to tie to the tank.

Any thoughts?

Thanks,
Dave G