I must have missed the original request for interest in this
project.  I would be most interested in the simplest design.  The
whole valves and transfer pump setup is not what I would want.  I
have to say I'm not that upset by the 250 mile range of my van and
this upgrade would be lower on my list than other items.  So perhaps
my 2 cents should only be weighted as 1 cent.

Edward