Former Jane's Addiction star Avery quit in May (13) to concentrate on other projects and told fans he had "very mixed emotions" about his decision.
Weeks later in June (13), Belew also left the group after less than four months, saying his place in the line-up "didn't work", but Reznor insists he is still friends with his ex-bandmates and their departures were amicable.
He tells Mojo magazine, "It really came down to chemistry. I'm delicately addressing this matter because I wish it would have worked out but it just didn't. What's happened is for the best. As far as I'm concerned there's no ill will there."