Looks good to me, though why would you betray your Chaos Heritage by going for stinky old guard when you can go Reneguards.
If you went Vraks as well you could go Ordnance Tyrant and havePlease, you injure me! You say this as if my Guard minis aren't mutants of the lowest stripe kitbashed from half a dozen kits...
(well, okay, the Death Korps aren't, but they were part of a dirt cheap bundle deal from a friend for 50-odd of them with half a dozen tanks for $75. Most of my Guard minis, then)