Thanks a lot for your response to this post.
we did export the camera info and hitched it onto a null in AFX.
the main issues have been to do with all the lighting render passes and shadow mattes on singles jarring with the remapped character passes on 2’s.
luckily the directors have opted for the whole piece, including the camera pass, to now all be on 2’s, so its a much easier solution alround.
Thanks again nonetheless