First link is work by Ivan Martin. He took the Serpent S240 and shrunk the base plates down to 1/28 scale. He also r-uses all the Serpent parts. I took it a step further and modified so you don't need the Serpent parts.
I will continue to work on this and make it available for those who are interested I modifying it for their own use. The file can be found here on thingiverse called the pancakes S280 - http://www.thingiverse.com/thing:1813021