When I commited to assembling the Ultramarines for a horus heresy event weekend I knew I needed at least one unit that would just pop! colour wise from the rest of the force on display, but still look cohesive. Mechanicum units have that ability to stand out in any army but back in my first edition Epic days there used to be a range of 'Robots' including an awesome Mantis looking unit that went by the designation 'Crusader' and I am sure Forgeworld used it as inspiration for the 'Vorax-class'. I literally constructed the army list around finding a way, any way of including a unit of the killer automata. That meant including a Praevian Consul as one of my HQ choices but that was a small price to pay. The Vorax were a star unit for me as they gave me the opportunity to introduce a contrasting spot colour to the blue and thus my orange murder-bots came into being.
The Praevian Consul and his murder-bot cohort
The Vorax are fiddly kits to assemble with a large component count, but that does come with the advantage of being massively flexible from a poseability perspective. I had a very clear vision that I wanted my Vorax to be highly dynamic, loping along in an aggressive hunting pose. The reverse jointed legs help in that regard but the one I was most pleased with, my star unit in the entire army is the one I built leaping over a Dragons Teeth tank trap with its claws grasping the fractured stonework. The balance of this one was sublime and I couldn't have been happier with the end result, all credit to Forgeworld for designing such a flexible kit.