Sky, put the uterine perf out of your mind with all the other one-in-a-million things that people simply cannot spend time worrying about.
If the doctor cannot avoid a perf when he's using a camera and should therefore know exactly where everything is....
It's much more of a risk with the d & c, especially if it's a "blind" d & c done without hysteroscopic guidance. But that is behind you now.
With a doctor who is a super-specialist in this area, you should feel very confident that risk of a perforation is virtually nil!