Basically Phil... you mean you didnt know that and thought the injectors flowed more fuel at the higher pressure...

I think a RRFPR with a ratio of around 1.2:1 would give such a small increase in flow that it would be virtually pointless to be honest.

Quick example:
With 1.5bar of boost we would only gain around 4psi of fuel pressure by using a 1.2:1 reg over a std weber 1.0:1

4psi extra fuel in a rail running 73.5psi isnt going to allow us any more safe boost boost at all to be honest, it will just stress the pump and fuel lines some more.

Hope thsi helps.