I have posted pics of Nomad and of the M-4 Robot. A viewer from another photo posting site reminded me of the Romulan Cloaking Device which, like the M-4, was mde from parts of Nomad. So here is a drawing of all three...M-4, Nomad and the Romulan Cloaking Device. People ridicule Lost in Space for reusing their props...Trek did it too...A LOT.