I just redid this one using the Rob Gendler technique Lars linked me too.
The luminance layer was added in twice first at 50% and second at 100%. It does give more signal and less background noise. Handy for galaxy shots for sure.
TEC180fl, FLI ML8300, HaLRGB 20 190 70 50 60.
http://www.pbase.com/gregbradley/image/124568750
Greg.