Here is the arm I am working on for my terminator apothecary. Base is a chainfist with a Inquisition shoulder pad where the trim and logo cut off to leave the skull. I think I need to cut down the laser scalpel some more to make it look less like the pistol it started as. I also need to add the controls to the top of the fist with cables running down between the display and the probe which will be part of the smoke launcher. The probe is a scope with part of a krak missile added.
Here is the next stage with some basic controls added to the fist. Next to start the body.