Dunno how active you are here atm but does the inscrutable machine (the actual machine) have any visual references? People seem to forget it in fanart and none of the book covers have it pictured, so creating a cosplay prop is proving to be a tad difficult..
Well, I assume the answer is way, way too late, but...
No.
However, this thing (apparently made by someone named Willa Yang) is pretty close. Penny things of it as a centipede, but I see it as more pillbug-y.











