Thanks! But actually... you can't. Apple put a HARDWARE delay on the Eject button. Another WTF move from Apple. Were people being killed by accidental CD ejections?

Regardless of the reason, Apple (per its M.O.) implemented a ridiculously complicated and crippling "solution" instead of simply making Eject a secondary function on some other key... like a Delete key.

So I have always had to use F12 for Delete (via Karabiner).

That's insane. And it's indicative of the Apple approach to computing: do things exactly the way Apple wants and you'll have a brilliant time. (This is my approach when it comes to providing tech support for family. I steer them towards being model Apple citizens and they get great outcomes.)