I reached out to Mola-Mola and GTT Audio essentially asking if there could be a path to add at least I2S to the Makua DAC module, like the Tambaqui, along with dip switches or App programming to configure I2S compatibility for use with various I2S disc transports, including SACD such as PS Audio PST. I thought it probably a remote possibility with too few potential buyers but thought best to get direct answer.
I received a negative response from both plus opinion from both that transmitting SACD layer unencrypted violates Sony patent and opens up possibility of litigation. Additionally response indicated that not only must "have priority encryption to work ONLY within the same brand transport/dac" or open to large risk.
They are aware that some companies have done so, but does not appear, for now, that Mola-Mola will do so.
I believe Sony patent is near expiration on SACD, but there may be amplifying related protections on this and/or various expiration periods worldwide.
In the world of litigation exposure, I can appreciate their conservative position on this isssue. I do not have a PST, nor have I posed the question to PS Audio.
I will follow this thread to see what you and others further contribute on this.