cool tune..
i love all the stringed instrument sounds.....
this could almost go in a zeppelin acoustic direction...
the vox sound like they are stereo,
or rather, everything hard panned,
is there a centered vox?
also, a trick to suggest if you are trying to tighten up harmonies....
automate all the vox tracks with envelopes (you probably already have),
and choose ONE to be the main vox (centered, stereo fx are fine) and at the end of each harmonized phrase,
let the one main vox line extend to the end, but drop the faders off severely on all other backing vox tracks just short of where the main vox finishes it's line.
that way you never hear a 'double' fade out that isn't in time,
the backing tracks will disappear at the last second,
but the main vox finishes the 'held note' or last sung note.
if you get the timing of this down,
it is almost invisible to everyone but the most astute listener.