This is a pretty obscure prop, I've always was somewhat interesting. They came up occasionally in episodes, from what I remember they got the flu once and sent the computer haywire. After finding some nice photos of an original prop on a cutting mat with some a 1in grid, this made the measuring and modelling work significantly easier.
Some screenshot from the show.
The very helpful photos
concept sketch, turned out a little different.
My Rough CAD model
Some screenshot from the show.
The very helpful photos
concept sketch, turned out a little different.
My Rough CAD model