It is so easy to catch "ejected" shells in the hand, that I don't see it as an ecological issue. It's true that with extractors, its one less possible problem to contend with, however if this is a "total" custom Fox, the gunsmith should be able to insure that it never crops up as a problem in your lifetime or that of at least the next generation. In short, do whatever floats your boat. It won't matter.