I had a discussion last night with LtC Tom about the A-10. He told me of his meeting last year with Pierre Sprey, the man who designed, in part, the F-16, F-15 and the A-10. It so happened Mr. Sprey died at his desk five days after that meeting. I recommend watching the reddit video of the man talking about the F-35 and what a dumb idea that aircraft is. You can draw your own conclusions. During last years meeting Sprey mentioned briefly the concept of capturing the spent 30mm casings and the main consideration was not CG (that could be overcome) but not spraying the troops on the battle field with all that falling metal. The Avenger was the perfect weapon system for the job (CAS).