I did not know until now that there's a jet in most (all?) group heads.
Enlighten me - why is it necessary? What does it do? What difference does changing the size make? How do you determine the right size to use? How many different types are there?
Enlighten me - why is it necessary? What does it do? What difference does changing the size make? How do you determine the right size to use? How many different types are there?
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