I had a friend in honours year computer science who did a project on tomography of the antikythera mechanism (working on image analysis software to remove ghost

I had a friend in honours year computer science who did a project on tomography of the antikythera mechanism (working on image analysis software to remove ghost images of other layers), and helped discover why his advisor's previous model of the mechanism was mechanically immobile (when you turned it, it locked). He'd discovered that an axis seen end-on was actually 2 axes, if I remember correctly. Amazingly enough he forgot to mention this in the end of year presentation of his work, so I got to ask that question to remind him... talk about burying the lede.