D.I.Y Adding a Return fuel line

[easymovet]

I saw this kit for a fuel return system using the stock rail (for diffirent car, but same regulator) implemented by putting the FPR before the rail, any reason a similar setup wouldn't work on our cars, it seems to address goals 1 and 2? Not sure how much of an issue 3 is, and 4 seems to be in doubt.

1. keep fuel pressure rising 1:1 with boost so that the injectors don't have to stay open too long and atomization doesn't suffer.
2. better pump life since it's not pushing against a headed load, it also runs cooler with fuel flowing.
3. keep the fuel in the rail from overheating given the higher IAT of F/I engines.
4. Some have said injector #4 starts to starve and returning on the other side of the rail keeps equal flow to all the injectors.

The AGP kit description says that #4 is false, I'm going to try some experiments with water and hoses to see if this happens Otherwise this approach will save us buying a fuel rail.