[Oliver Parker] ” If I cut with just the stereo tracks, when I lock the cut and export the omf will the original full number tracks be there for the Sound post?”
no automatically, no.
you can try cutting with just the mix,
and at the end of the edit, you can do a pass where you match frame the audio (which SHOULD bring back all tracks into the viewer)
and re-edit the full set of tracks back into the timeline.
problem is this can go wrong. FCP can lose the lnk back to the original master clip.
there was a long-ish thread about it a while back.
2 other approaches to editing w the mix-down:
1. you fix the problem:
edit with the mix-down,
use Sync n Link to re-conform a multitrack version in FCP prior to making the OMF or AAF
2. sound fixes the problem:
edit with the mix-down,
give sound dept AAF
sound dept uses Synchro Arts Titan to re-conform in ProTools
but you could (probably should) just edit with all the tracks,
in which case you might not need a mix-down on A1+2
nik