Thanks Ross Marc and Ken. I was trying to get a decent mosaic of the Coal Sack or Emu Head but the bright stars of Crux produced faint reflections. There are still a few there but we take what we can get.
You are correct Ken it wasn't until I saw the whole mosaic that my mental version of this region changed completely. The wispy dust lanes are clearly separate from the stars. There seems to be a better sense of the 3D nature of the Milky Way.
Here is panel 4 at the real resolution of this data. It shows the lovely 'reflection' nebula due to a bright star of Crux.. 14MB
http://d1355990.i49.quadrahosting.co.../CP4hdr_10.jpg
At full resolution this mosaic would be about 18,000 x 10,000 pixels.
Bert