help me find an electrical gremlin, please

Yeh.....8 THOUSANDS, not 80, and not millimeters I haven't "miked" any credit cards lately, (example) but they are way more than .008"

(Goes to basement, comes back with caliper, mike)

Several credit cards run about .030"

Several business cards run from .010 to .015

I have a ream of Staples "multipurpose" so called "20 lb" paper.

10 pages runs .040", so TWO thicknesses is almost exactly .008"

ALSO important when you check the gap is to inspect for debri and strike damage, shaft wear and bushing play, and AFTER you set it, check that the reluctor won't strike the pickup.