High Treble Unisons - attack or sustain?

[John Dorr]

Esteemed List,

It seems I've noticed when setting unisons in the high treble area that 
sometimes each string can seem to have its own direction it wanders off into, 
independent of the frequency on its initial strike.  One string may go flat 
during its sustain period even when the "lights stand still" (I use an SAT) on 
attack.  Another of the unisons may strike well but go MORE flat, or sharp 
first, then flat... yadayada.  So I find myself trying to make a decision as 
to whether to tune the strike or the sustain.  Has anybody else noticed this 
phenomena?  (I think you'd hafta be deaf not to)

My conclusion:  Whereas: those higher treble notes don't have very much 
sustain, and the sustain is probably less listened to than the attack.

AND, those notes oft-times are played very quickly, and with plenty of other 
notes, high and low, going on in the music at the same time.

Therefore, I resolve to tune the attack rather than the sustain, compromising 
if need be by making the sustain as inoffensive as possible while giving 
preference to the attack intonation.

I realize I've made no reference to "wild" strings here.  Maybe those are 
another topic.  I recognize them, too.

Am I on the right track?  What are your thoughts?

Thanks in advance,
John Dorr