There is a new unofficial codex at www.tempusfugitives.co.uk
Its called Soul Forge and it covers all sorts of daemon/machine creations including Obliterators and Soul Grinders. Check it out and let me know what you think!
Not bad, obviously thought through. Some minor problems, I thik, but otherwise, looks fairly solid.
But, why is the Warpsmith Rear Armour 10? He seems to be a larger Soulgrinder, which have Rear Armour 11?