Yup - it's a 201-2 electric potted motor. He's using a hinged narrow foot (nothing special) - the screw holding it on makes it look like a roller. The shell holder is heavy elastic and he's got a layer of leather for backing and the 201 doesn't even notice.
The clamp on light is really nice - I got it as an add-on with my quilting frame. But then when I finally ordered the machine, I got a deal on some other special lights, so I gave that one to DH. The sloped ceiling in that room makes lighting a bit of a challenge - can't put a floor lamp over there.