Could you drill a tapped hole into the PV restriction area and screw in an idle screw to alter the PVCR area? Not looking at mine but I drilled mine out to .076 and perhaps I went a little overboard. I can always plug and redrill but adjustability would be very cool with a wideband O2. With a fixed PVCR hole you could adjust with the wastegate..too rich, just add a few PSI!
