I just pulled #3 and #7 plugs and they both were very similar. The porcelain was clear with slight brown color. Both of the plugs had a full ring of color on the bottom of the plug thread. They both looked good.
I do have fully adjustable metering blocks. I also have the small chuck with a small assortment of smaller drill bits for my air bleeds and my IFR's. But I do not have any precision bits for the PCVR's (.050's-.060's or so).
Can you give me some information as to why I should be looking at a pv in the secondary side of the carb? How do I choose the pv for the secondary side?

Thanks