Dodecahedron Puzzle

Take pentagons with one slot right or left to the center of each edge.This way you get eight different one-sided pieces. If we add copies of four pieces (LRRR, LLRRR, LLLRR, LLLLR) we can construct a dodecahedron with matching edges, where R-slots and L-slots fit together. 30 small U-profiles are used to connect the pentagons at their edges.