Foetid Bloatdrones are Daemon Machines which have a Daemon animating them. Did you ever ask yourself what kind of daemon it is which is bound to them?
In this case, it is Mickey and Shoomey the racing Nurglings! The Drone is my first conversion with green stuff, and I have to admit that the paint job could be better. However, I am still happy with the result and how perfect the Nurglings fit in the Drone.