@lowrider57 oh, yes...that’s right... I do remember my local dealer mentioning that fact about the tubes that go to Peter at AN are more tightly matched.I’m sure he pays extra for it too. I had forgotten about that fact as I myself have resorted to seeking closer matched triode pairs in the premium boxes with test papers keeping my fingers crossed they might be a few % better and might last a tad bit longer now that I’m tube rolling less any more. These newer gen tubes are "good enough" for me and sounding nice. .