Hello Tim,
The CueCore has Playbacks like the QuadCore does, however these are implicit. Whenever you would start a Recording, a Playback is attached to the Recording and will play it back. This is not visiable for the user, however it's still there. Both CueCore and QuadCore have a limmited number of Playbacks, the difference here is that the CueCore has 4 implicit Playbacks that are attached to Recordings and QuadCore has 6 explicit Playbacks which can play Tracks. The number of Playbacks determine the number of Tracks (for QuadCore) or Recordings (for CueCore) that can play simultaneously.
From your post I think you are not looking to play many Track simultaneously, but just jump from one Track to another. What you can do is use one Playback with Cues for every Track you want to play back. Then use the Transport task type in the Show Control to jump between Cues.
Please let me know whether I understood your intentions right and whether this tackles your problem.
Best regards,
Jurrien