Nice one, Joe!
I was observing exactly this with my 20x80T binoculars at the same time! I could see NGC4945, but not sure if I could make out NGC4976 (in the bottom right corner of your image) or NGC4945A which looks like it has a relatively bright star in front of it (about opposite NGC4945 relative to the centre of your image).
What a coincidence, and a good capture!
Al.