When using the RX3 in Performance mode, I can select the deck number on the left side of the display screen, and it will change to either deck 3 or 4. I can then load up a track on deck 3 or 4, and play it. Rekordbox also shows the track playing on deck 3 or 4, and I can actually have 4 tracks playing at once. The problem is that the two faders on the RX3 cannot control decks 3 or 4, so I can't hear the track playing on 3 or 4. I imagine you're going to tell me that the RX3 doesn't support the functionality of switching the fader to from deck 1 to deck 3, etc.. which is a shame, because it seems like the feature is practically built in already. I'm seeing a track playing on the screen on my RX3 on deck 3/4.. It seems like all this unit would need is a software update to switch the fader to a new deck. Can this be something that's implemented for the RX3 in the future?