Say, I seem to recall once seeing someone share a picture of some Warhammer Cadians converted to be pilots for Legion. Anyone remember seeing that here?

Nope, but it sounds interesting. I've still got some IG parts kicking around; if someone can produce a link, I might give it a try.

I've used head, arms and hands, maybe some pouches and they fit pretty well. Some of the heads are too small actually. It kind of matters which kit you're attaching them to.