Happy Birthday, Crys!
Many, many hugs to you!
Writing: I finally see a way to write a Paul Graves story set in its own universe instead of J. K. Rowling's. I don't think I can write To Move the Heavens in anything but the Potterverse, because so much of it is dependent on there being Death-Eaters and the Grey Lady, as well as Viv's characters. (g) Maybe there is a way, but I don't see it yet. I do, however, see a way to write Le Livre de Sangre, so I will write that--after I finish Avriet.
At this point, it is likely that I will write To Move the Heavens as a fan story, because I do still want to write it. But I'd rather tell the story in its own universe because I am less likely to spend time writing a fan story as I am on something that I could maybe get published.