Hello ink,
Perhaps you can follow references in above Post #:
41722972and one-by-one references in it.
It may give latest progression through SR Group efforts on recovery applications.
CDDA pipe-dream is still on the burner.
We were supposed to have news from SRGr on results of this application.
Still waiting.
The remaining motley group here on OCV thread may from time to time
provide some insight; though needs vigilance and scrutiny.
Best regards,