Re: I think I'm close to being done.....
The two tanks are separate but connected.
When the lower tank runs low- I open the petcock of the upper tank and let fuel drain into the lower tank though a fuel hose that is connected between the two.
I cut a small hole into the top of lower tank and epoxied the fuel hose from the upper tank into it.
It looks a little ghetto if you examine it closely, but it works :-)
If some's good...more is better and too much ain't enough.