Nice XD. BTW, I reread the afterword of vol 10 and it seems Narita-sensei plan to resolve the dollar arc in vol 12 at the latest. After that, he sid he's going to either write about Celty's or Shizuo story, although he's not sure if the title of the novel is still going to be durarara.
tl;dr Durarara gonna end in vol 12