Joe,
Regarding this part of your question, it is most likely that the fuel will NOT divide equally if you T the returns. Not a good idea, as small changes in pressure drop/line length, etc. will affect the fuel distribution, and you may not know where the fuel is.

Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From: Joseph Berki
>>Is there any way to divide the fuel return so it can be
> > returned to both tanks?  If you tee the return lines does the fuel divide
> > evenly?