Bazookafied wrote: since it still isn't posted on MAHQ
As far as I can tell, there's still a question of whether it's a "real" mobile suit in the Unicorn continuity.
However, it is presented alongside the other MS in the recent Hobby Japan four-page spread of Gundam Unicorn mecha. This suggests to me that, even if it will never appear in the story, it's considered to be "part" of the Unicorn series.
At the very least, since it's not a design that was originally created for the Unicorn series' background info, there should be a mention of it as an MS Graphica original design, with that book's CG art of it. The post I linked to in the Unicorn thread even tells us that there's some kind of story associated with the Graphica book, placing the Delta plans as an element which survives the Gryps war and eventually becomes public knowledge.
I don't know whether Katoki worked on MS Graphica- but it seems like his version and the 3DCG are very, very close.
As for where MS Graphica is filed, and where miscellaneous art seen in "Gundam Ace FIX" is filed, and so on... that can surely be dealt with in time, in the process of reorganizing all the MSVs and magazine stories and such.