So, new GK codex, and Gun Servitors are ludicrously cheap, and you can have 12 Heavy Bolters in a squad for slightly more than one and a half squads of IG.
Who else sees the possibility for what can only be described as a staggering amount of heavy firepower? Especially if it's attatched to Coteaz if He's Been Expecting You...
My AdMech proxies suddenly have a viable (if not entirely sane) list!