Convert to replaceable idle air bleeds?

Yes, I have a wideband gauge on the dash ;)
Once I get a clean transition, then I'll start going after the PVCRs. Cruise on the mains is good and lean (14.5-15.5).
First step is to put an 8.5 or 9.5 PV in, since I now know that Holley's rule of thumb is completely wrong (there's a 4.5 or 3.5 in there now!)