This is made from a Maggoth Lord (that I bought off Lee ages ago) and one of those Ad Mech Kataphron battle servitors. Plus some green stuff cabling.
I think if I ever get my sorry self around to doing a Dark Mechanicus project, this could also adequately serve as an Iron Strider or whatever they are called.
Regardless, it shall now sit waiting forever to be undercoated, and then a further 73 aeons before being painted.