Nice shot, Greg. Excellent image scale. Be good to get some LRGB and NB colour into it as well. Have all three then...greyscale, LRGB and NB shots of the same subject. Make for good comparison of the details each can bring out.
Very nice Ha data Greg. Plenty there to work with so I am looking forward to you adding some RGB to this. The detail is great and the pillars look fantastic.