Hi,
as earlier shown in here, in 2014, I was able to make an update of my M97 object.
I was lucky with the weather conditions in Copenhagen Denmark a couple of days in March 2016. Now in total ~6.6 hours exposure of the M97 object. The OIII halo consist of 48*5min subs = 4 hours exposure blended into the green and blue color channels.
This is a slightly modified/updated version compared to the version shown in my astrobin account.
Thanks for looking. Kind regards Niels
http://www.astrobin.com/users/nvcchr1/