One of them was the re-worked Blakist drone Battlemech called the Revenant. So I wondered how it would look with a cockpit. Fortunately, with 3.5 tons of drone control gear, it was easy to fin the tonnage to put a standard cockpit in, as well as an experimental "Quad" turret. I also decided to swap out the quad light MG for a pair of standard MG. Lastly, added BAP and ECM to it.
The fluff is that an enterprising Mech Engineer and some of his colleagues saw an opportunity. After the Jihad there were HUNDREDs of destroyed and shut down Revenant drones. As part of a unit tasked to clean up and dispose of the wreckage from the battlefield, he saw opportunity. What if, with minor repairs, he could refit them with standard cockpits and re-sell them? With some help from some friends from the Solaris Skunkworks, within a year the first UBM-3M(anned) were available, and within a few months after that, the Revenants success in the arenas (and the infamy attached to it's Blakist origin) appealed to people looking to display a bad boy image, and sales sky rocketed.

(simple pencil and paper sketch, but have no scanner access, so picture taken with my cell phone)
Thoughts?