I still haven’t heard back from Asus, and now that it’s the New Year holiday, I expect they won’t get back in touch with me till next month. I’ve written Blackmagic, but my worst fears appear to have come true: the Blackmagic UltraStudio 4K Mini does not send HDR metadata over from Final Cut Pro. At least, that’s my conclusion, unless someone can show me what I’m doing wrong. Rather than spend thousands more on an Aja I/O, I guess I’ve got little choice but to cough up $300 for DaVinci Resolve Studio (the free version doesn’t support HDR grading). Meanwhile, there’s always HLG!