Sorry sharunas that I didn't express myself precisely enough.
Sascha1990 is the master of 3D modeling & printing, who had reported about his awesome project on it both in our
German forum (raumfahrer.net) and in the
NSF forum (nasaspaceflight.com) and generously made his
3D STL Files for printing available on
Thingiverse. But some unkind guys were putting heavy pressure on him to share the LUT 3D files ...
And now to my
NSF friend, who was also enthusiastic about Sascha's 3D Crawler and who has told me the whole tragedy. He also wanted to build such a crawler by using Sascha's 3D files for 3D printing. But he unfortunately didn't download the files immediately because he wanted to buy a 3D printer first. And when he wanted to download the 3D files they suddenly were gone on Thingiverse,
because they were removed by Sacha1990 meanwhile ...
I hope that the fateful connections have now become clear.