I had a go at the Tarantula Nebula using my SBIG ST4000.
I used my Celestron HD Edge11 on a CGEM mount for tracking only, with no guiding instructions to the mount.
I used the SBIG AO8 adaptive optics unit only for guiding for the first time.
The image is a stack of 2x10 minute exposures.
The AO8 did a very nice job guiding and made the guiding process very simple.
The ST4000 has captured some good detail and star colours.
http://www.wsaag.org/cpg1414/thumbnails.php?album=3