Not stupid at all C if you've never taken this base fully apart. All good answers here. The pos pin (airholes) screws through the insulator into the positive post bracket on the deck. Back it out and take a look. Loose insulator seating is the most common fault that drives res values unstable. Don't overtighten tho as this very slight shortening can impede good contact with the AF base or worse make the base pin too short at the 510 exit!
That pos pin can get pretty cruddy inside. Oxidation and residue can impact performance (and flavor) so I'm routinely taking these guys apart to clean, ultrasonic or polish them if need be. Not a big deal as you can go thru quite a few fills before it's needed depending on the juice. As with the old PT heads tho it makes for better results so I keep a batch of fresh ones handy with an oxidized t.m.c. wind installed ready to be wicked with KGD or Nextel.
Thx for the pics
@JimDrock.
Good luck.