[Elecraft] matched crystals?

[Nate Lewis]

Moderately stupid question: so I'm building a K2 for someone who, when he
ordered the kits, thought the 14 matched crystals sounded like a good idea,
which leaves me with more choices than I wanted.  The K2 and KSB2 filter
crystals aren't the same (one set is marked 3.6 and one's 3.7).  The matched
set is 14 3.7s.  Is there any value in having the same values in both the CW
and SSB filters, or should the matched 14 go back to Elecraft?

Seems to me that the only effect of matching all 14 would be for the xfil
control paremeter numbers to more closely match between SSB and CW for
similar passbands, and since those numbers aren't meaningful by themselves,
there's no point...?  but then why does elecraft sell 14 matched crystals?