Thanks for the reply Les. I've only had the scope for less than 6 months so i'm learning at a fast rate!
I've got dark skies so i'll keep at the horsehead. I might get a uhc or h-beta filter in the new year. Otherwise i'll have to wait until i get a bigger scope in a few years
I'll be doing some research on Eta Carina this week and HD 93129AB which you mentioned.
many thanks!
Sam