So these two chaps are far from perfect, but I am sufficiently happy with the concept that I will take this forward and hope to improve the execution of the technique as I go along. The basic premise of the primary red/orange scheme for sergeants will be changed up a little for HQ's but in general that will be a way to distinguish them from the primarily grey scheme. The OSL needs work on the jets, mostly adding a bright white to the heat centres, but I'm pretty happy with how he's turned out as well.
I'm going to be running a chunk of the Inceptors as I really like the models and the concept of them, plus the rules are nice enough! I am thinking of getting a couple of Redemptor Dreadnoughts, but boy will I be converting them!!!
You can also see my first attempt at freehanding the chapter symbol. This is a composite of the Evil Eye and the Alpha. With the the symbolism of the Evil Eye representing a multitude of things, including the fall of Horus, the Eye of Terror and the constant vigil against heresy. Whereas the Alpha symbolises the determination to be the first line of defence as well as the best line of defence, i.e. the alpha predators of the imperium.
I have yet to come up with a satisfactory chapter name however, so suggestions below that feed into those themes will be most welcome :)