I had uploaded more parts of the story, which I called the chronicles of derby, so you search them on the MLP gallery, you'll find them. This was my most recent one fav.me/d6twr7i and my last one for I decided to end it.
yeah bro, i know it, i goed to your page on tumblr and i liked it very much ! i reblogged all of the history you maded so far, and the followers too , they liked it very much ! look, i know its hard to make it, i'm a begginer on art, still is on pencil and paper, but i really liked it, so i have to tell you something.. you are really good in what you do, i wish someday you come back with the project, and remember, i will read every single letter you write there, you have my aprovation and the aprovation of my followers .. you are really good bro, i will still reblog your arts, liked u very much :3
"They mocked my voice and my eyes. It wasn’t my fault why couldn’t they see...Then so be it if they cannot accept me for who i am then i shall hide behind this mask and the will never see the Derpy they once new again"
(Quote taken from the journal of high empress Derpy of Equestria)
This. Someone tell Mane 6 to put this in Fighting is Magic as a taunt for Derpy!
Personally, though, I think the armor is an original design, since there are so many varied suggestions on what it /could/ be. If it resembles so many, then it might take inspiration from one or several, but probably isn't any of them : )