Rekordbox DJ software - One player to control multiple decks

I want to be able to control 4 decks with one player in HID mode. I've got the XDJ-700, but this feature should be available for every pioneer player. You should be able to control the deck that's in focus in Rekordbox DJ. When you switch focus, say with a hotkey on the keyboard, the deck that the player controls switches, so you don't have to buy 4 players just to practice at home. I always DJ with 3 decks, and I simply can't afford to buy 3 XDJ-700. Not only that, but I haven't even got room for that many players in my small room. I know this feature is available in Traktor, so it should definitely be possible to implement.