I started to draw a Roles but ended up to a clone of a car, traktor and a tank.
STL (Stereolithography, filesize: 936 KB), OBJ (OBJ, filesize: 796 KB), 3DS (3D Studio, filesize: 444 KB), FBX (Autodesk FBX, filesize: 783 KB), IGE (IGES, filesize: 299 Bytes), MAX (Autodesk 3ds Max, filesize: 714 KB), SKP (Sketchup, filesize: 1.04 MB), OTHER (Other, filesize: 380 KB)