Scott,
I understand the principal of keeping the "big" pumps primed, but won't the intank pump be a 'large' restriction for the amount of fuel that the two external pumps are capable of flowing? This is assuming that the two external pumps are fed directly and only from the intank pump. If this is the case, and the intank pump can flow (GPM) as much as the two external pumps together, then is there really a need for the extra 2 pumps? Now if you're cobbling something that will allow the two external pumps to draw fuel directly from the fuel cell, while suppling prime from another source via a "T" arrangement before the pumps, then that might work.... emphasis on "might"
- Jim -