i said you can switch the relay off the engine running signal, its not dodgy at all.
only difference with my setup is the fuel pump turns on when the engine turns over, not when the key is turned to start.
i dont do things dodgy, believe me, and this is on my own car. The dodgy way to do it is to switch the pump from ignition, which i agree is very dodgy.
i know you do this stuff for a living, but dont knock something until you have tried it yourself.