Ah this is an older one... the resolution seems a bit low/lines fuzzy, though maybe it's meant to be a more so pixel style piece? It seems to be done with vectors though, in which case you should be able to scale it so it looks smoother. If you still have the vector points you wouldn't need to redraw it.
Love the design anyhow, and the backstory. Really a character with character; fascinatingly thin but hopefully still durable robotic frame... and the flaws do make the hero!
Nice work.
-cd-