I'm not sure if this has been addressed yet, but are the VF-31s being used by Chaos under a similar situation to what the VF-25s were in Frontier, where they were being tested out by SMS before mass adoption? I also find it interesting that the VF-31 which is based of the VF-30 developed by SMS is currently only shown to be in the hands of a different civilian contracter, unless another party developed it.