First, I love the rampant speculation.
Second, I'll revise the list.
Third, I should just post random questions, because it's spawned an interesting conversation.
Fourth, the GW website lists Karamazov as Infantry (Unique). Not a walker by the strictest, most technical term. I might have access here to a GK codex... in the same room as a sleeping roommate who just flew in from China. And boy, are her arms tired!
Fifth... oh, you're waiting for a fifth? That's cute.