Welcome to HN! Your submission was dead, so I vouched for it. The topic seemed really interesting, so I upvoted it. And then I realized it was just a teaser. This doesn't break any rules, but was disappointing.

I clicked on it in part because I just tried an excellent Quebec Black Currant wine, Orsis by Domaine Ives Hill. Any chance you know what their particular technique is? https://iveshill.ca/en/product/orsis-2/