Also I was thinking - if they are kind of bigger than your average human, or atleast have a different structure (evidently scales and such would do that) wouldn't they need special armor and special weaponry? I'm sure a big finger wouldn't fit the trigger unless it was an uncovered trigger (which means any snag on the trigger can set it off).
I think it'd be cool if there was some sort of special weaponry made for them, custom, by the OSA. A welcome gift so to say.
Furthermore I like that they use religion, though I wonder that since humans are seen as their creators what is the standard/average reaction to humans? Surely there are some that see them as their gods/goddesses while others shared Lex's early idea that humans were prey.
I think that if the humans created them surely they can put down a few Draken in case they tried anything funny. Especially if they were a medieval-ish society. Not sure what your idea would be on that though. When working with races, it's always hard to get a grasp on how the different races stand up to each other.
PS: Draken translates to dragons in Dutch, the more you know.