Parts Instant Double on DJM-S11

I Just realised that the Pioneer DJ FLX 10 controller has the ability to instant double specific parts of a song onto separate decks. This is something DJM-S11(Rekordbox) users have been crying out for even before stems became a thing. I have suggested on a couple of occasions that at least the 3rd & 4th Decks on the S11 should be much more usable than it is when using rekordbox. Can this feature be made midi mappable so that S11 users who use rekordbox can take advantage of the creativity that comes with it? I would so happy. Thanks