Hey Mike, looks like the person who spit on your CCD chip had a sinus infection.
.
In any case, very nice image mate (naturally)
. Have you thought about a barlow? Definitely prefer the cropped version (your favoured framing) - very nice! I must try this target again one day to get both objects in the field. Interesting to compare my WB version (shot at 1760mm) with your 3576 only crop:
http://www.pbase.com/gailmarc/image/94206350/large
Cheers, Marcus