Chris - another wonderful gem of a picture - I like the photo the way it is now. Is this before or after your editing? Not sure that i would do anything further to it.
As to the photo itself, it is very beautiful. A gorgeous family, you can see the pride in your Great-Grandparents, and all so magnificently groomed and dressed.
Thank you so much for sharing this one. I look forward to seeing more, I'll bet you are having fun going through your treasure box.