While I personally am not very much into the space piranha design for Ork ships, I absolutely HAVE to applaud your superb deadnot model.
Rather than a simpe upscaling of the existing design, it really looks like the functioning appliance of the official Ork design principle to a huge ship class. Far more so, in fact, than the official ship designs by GW for the named Ork Battleships.
You also managed to convey a really nice sense of scale with your detailing, I admire your handiwork.