Small diretrosnub prismatodisnub heptishexacosichoron

The small diretrosnub prismatodisnub heptishexacosichoron, or saderspeedshox, is a nonconvex uniform polychoron that consists of 600 great icosahedra, 1200 great dodecahedra (some of which lie in the same hyperplanes, forming 600 pentagonal retrosnub pseudodisoctahedra), 4800 octahemioctahedra (forming 2400 compounds of two), 600 small ditrigonal dodecicosidodecahedra and 600 small dodecicosahedra (forming 600 compounds of one of each), 600 icosidodecadodecahedra, 600 small rhombicosidodecahedra, and 6000 triangular prisms.

One great icosahedron, two great dodecahedra (two compounds), eight octahemioctahedra (eight compounds), five small ditrigonal dodecicosidodecahedra and five small dodecicosahedra (ten compounds), five icosidodecadodecahedra, five small rhombicosidodecahedra, and five triangular prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary trishecatonicosihecatonicosihexacosichora and 5 small dipentary trishecatonicosiprismatohexacosichora. In the process, some of the octahemioctahedron cells blend out.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the small diretrosnub disnub decahecatonicosadishexacosichoron.