This modular starts with equilateral triangles. The diagrammed model has 8 units. The slight variation is a dodecahedron with twenty units. I checked in Gurkowitz’s(sp?) book, to make sure it wasn’t the one equilateral triangle modular I’ve made. However, it is such a simple design, I wouldn’t be surprised if it has been created ten times over. If this is the case drop a line and I’ll include pertinant information in the post.
4 units connect to make one face.