That's what I thought at first, but then another thought came to mind. Say he has the rod adjusted so that he is making 14 psi of boost without the G-valve.
Then if you go and install a G-valve set at 10 or 12 psi, you are not going to be getting the full benefit of the G-valve. With the G-valve set right at 14, then you might not have a problem, but why take the chance? It would be safer to have the wastegate set at a lower boost, say 8 psi, so then you will be sure to get the maximum effectiveness out of the G-valve.

If the wastegate (without G-valve) and the G-valve were both set around the same setting, then perhaps that is a thing that would contribute to the boost spiking that some people complain about. I have no spiking. It seems to me that if the wastegate were set to a lower setting than the G-valve, that the wastegate would act more rapidly when the boost signal gets through the Gvalve.

Greg