Very nice! I was having a hard time to create some of these effects. (read the f manual lol)
This is my variation of your project
Black Hole FeedingI've used some different settings for the bodies, and instead of using two bodies (one above and one bellow) to create the jet, I've used several ones, with different distances from the bh. This gives out the impression that different quantities of matter are falling at any given time.