Writer here. I saw it on Tumblr at the end of December, someone had posted a pic that looked like a scan from an official book, that had their ages as K-30 H-29. So that's what I was going off of when I started this fic on Jan 1st. But now that the script has been leaked I guess it's official that H-34 K-30. But there is still a rather large amount of confusion on this topic in the fandom, unfortunately.
Re: FILL: Fluid Truth in Stasis (Kylo/Hux, Rey/Hux/Kylo) chap 2 part 14