On Tue, 09 May 2006 13:17:35 -0700, RW Salnick
wrote:

It is certainly true that with a pump or two and 10 or more
valves, you can set up for almost anything. But will you get it right
in the middle of the night? Years after you designed the system?

Good points. Speaking from personal experience, it is very easy to
open or close the wrong valve in the heat of battle (big seas,
sputtering engine, etc.). That is a bad time to accidently introduce
air into the fuel system. Don't ask me how I know. :-)

In addition to keeping things simple and intuitive, it is important to
rigorously follow a tried and true procedure so that no ad libbing is
required. It is also worthwhile to invest in a nice set of engraved,
color coded labels for non-obvious valve positions.