Welcome to the long imaging club Mike.
Lots to like in this image. Me personally I really like the IFN (it's all over the place), the back ground galaxies, the preponderance of stars, even the extended shape of the halo of Centaurus A. You can see the shells but faintly too. Colour of the stars and the background is near perfect in my opinion. Though I am not sure about the saturation of the Ha. It looks a little too much to me,
Overall a great image. I don't think there is any doubt that you captured the Ha jet well, least not in my opinion. Maybe your signal is a bit more blurred and that is what is looks like there might be more?
It's got me thinking about a future project myself with the AG12. Like I said there is lots to like in this image.