Chris, I agree with you with the regulators, spot on.

Some injectors will not allow the additional fuel, which is not much at all anyhow. Only reason I would use a rising rate reg is with a modified fuel system for tuning.

Another point of interest, rising rate fuel regs do not increase at a set rate according to boost level. A little hard to explain, however there is not set relation between the 2, i.e 1 pound of boost gives you another 2 psi of fuel pressure. This DOES NOT happen.

I think i made sense