I have mine tuned with thicker and thicker wires stuck in the IFRs until the idle mix screws came out to 1.5 turns from seated to best vacuum. Then slightly bigger IABs finished cleaning up the low throttle cruise which formerly fouled the plugs quickly unless I blew it out on the highway.

The Power Valve and PVCRs are tuned to give sharp low throttle manners and economy until passing power is needed- then at the point where the conservative primary jets become too lean and vac drops with throttle opening the PV opens and richens the mix back up to max power.

My secondary is opened along with the primaries at idle to reveal square sections of transition slot. I run a plugged 2nd PV and big jets for best times at WOT. I watch my vac on the big end to make sure my primary PV doesn't close at high rpm creating a lean condition.

Good luck with yours