Here is my first crack at the plumbing.
Of course you will notice that my return flow T'd off to another line that may get less flow. Note, in the big picture plumbing it this way would be best as any other was would have called for more elbows whereas I am now only using three.
When filling the tank the difference between flow wasn't noticeable.
[IMG]http://img.photobucket.com/albums/v392/shonuff66/3sumpplumbing018.jpg[/IMG]
[IMG]http://img.photobucket.com/albums/v392/shonuff66/4sumpplumbing019.jpg[/IMG]...