The article links to a vulfmon track with audio and a still photo, but the video for same track on the vulf channel proper shows the instrument actually being played[1]. When I saw this a couple of months ago I had a bit of work to convince myself it was a real instrument - Stratton makes it look just too easy!
Coincidentally, I found a 1976 video[2] of David Vorhaus playing his Kaleidophon around the same time which gave me the same skeptical vibe.