That's very nice, Andy! Good detail in the galaxies and all the faint stuff is visible.
You could have tamed the background by stretching a bit less but where's the fun in that
I was guilty of pushing a little hard in my Astrofest image of the same region.
There's a slight gradient that DBE would take care of and you could clean up the background if you wish (perhaps a RangeSelection mask to protect all but the background and another MLT noise reduction or perhaps just delete the first couple of layers in MLT or MMT.)
I also identified Abel 1111 from a couple of annotated images but someone pointed out that this cluster was in the wrong place. After digging a little I'm pretty sure it is actually ACO 3998.
Cheers,
Rick.