You'll have to post in this thread to reserve it, as Deck Knight's thread has been discontinued.
Looking over that thread, it appears that user Hatman has reserved it already, but as he has only ten posts and has not posted his thread yet, you could PM him and ask whether you can take over his reservation, post in that thread to make public that you have done so. If you don't receive a reply in a week, then you can take over the reservation, I guess. Then, post in the official reservations thread to formally reserve it, and I'll add it to the index.