One more Question/Suggestion:

When I take a disc out of a player, (say, to play in my car, or whatnot), then, click to play that disc in CDJ (w/o replacing the disc first), the player/slot number info turns into a "?" meaning "CDJ: I don't know where that disc is!"

Now, say I want to put that disc back in the exact same player and slot (ie: return it to its home), is there any way I can find out what that player/slot information is after CDJ reports just a "?"?

In other words, is the player/slot data still stored in the database, and can I access it? I ask because this is becomming a frequent problem when I move my discs out to the car for a ride, then, months later, forget which player/slot I took them out of.

(If there's no way to tell, could CDJ do something like: add a field somewhere in the disc display to tell if the cd is "1: available" (maybe denoted with a "PLAY" icon or something), "2: missing" (question mark there, but not in the player/slot field), or "3: scratched" (if skipping is detected on the disc).