I'm so far hearing the Terminator 15th is fine without a DDC, as it already comes with extremely capable Dual OCXO (oven controlled crystal oscillators).
@vthokie83 Good point. I just read someone here got the new Laiv DDC and found it to make a significant improvement with his T2 that I believe also uses an OCXO clock although not sure it’s as good as those used in the 15th so something to explore. I also saw someone recently replaced their Harmony DAC with the LTA Aero DAC that he much preferred, and since I forgot to mention the LTA earlier I just wanted to circle back with that as another potential option. FWIW.