The down side is you need two high power amps and one pressure sensor.
Two pumps in a low wing.
These may be less reliable than a couple of pieces of hose a mechanical
pressure regulator and a four way fuel selector.
I am not sure that vapor lock would be more likely as Charlie Kuss thinks.

It would be possible to implement a PWM pump either with a  $5
PIC computer or maybe even dedicated electronics. That way it would
work with any EFI system.

Paul Lamar
 
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