Dasleah

How about adding Knight Households (and the Forge Worlds they're assigned to) as well? Not much on them, but every little bit counts.

Perhaps you could introduce some sort of ceremony whenever a Marine is sent to Mars for training. A sort of ritual funeral, whereby the Marine is for all intent and purposes, dead, and in his place will come a subjucated heretic (the Techmarine). The Forge would be a solemn and dark place, and the Chapter would see it as defiled ground. One of your reserve companies (or at least one of the ones kept to guard the Frotress) could be a ceremonial watch-dog against the Forge, keeping an eye on the Techmarines and ensuring that their blasphemy is used to crush the enemies of Man, rather than for the foul intents of their Omnissiah.

Emo Techmarines? :tu: :lol: Don't see anything that wrong with it. I'm not sure that there'd be a major theological struggle with Techmarines worshipping the Omnissiah. Marines don't really hold to the pretext that the Emperor is a God, and it's the struggle between Emperor and Omnissiah that would cause the most anguish. It'd mainlu conflict with the personality Cult of their Primarch, which the Chaplains wouldn't be happy about for sure. But re-reading your IA, I see that they're a Monodominant Chapter, so I suppose they see the Emperor as more than just a Man. It'd be interesting to expand upon it futher, maybe introduce some named characters that highlight and define the internal struggles in the Chapter. Like, maybe, a particular Chaplain assigned to the Scouts who perhaps goes a little too far in their indocronation against False Gods, and lets slip with something about the Omnissiah. Just an idea. It's great to see this quality of IA back in the Liber.