I would agree that hsfs 'should' have such - but they don't
but if all were tested that way . . . .
I guess the question might be resolved by testing one with, and then without
and looking (with some precision) to see if there is a difference (a difference of significance ?)
I have a digital manometer and 0.01° resolution (blah. blah)
BUT no hold down lugs
want a loan of the manometer ?
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