> > > I'm Looking for assembly instructions for a ball made up of Sonobe units. > not the 30 parts ball... but the 270 parts ball (or bigger). > > i think its also called the epcot ball. > > Hi Ami,

I think you are looking for the following: https://math.stackexchange.com/questions/3243724/which-geometric-shape-of-icosahedron-origin-has-180-faces-270-edges-92-vertices I have not constructed one, but to make the Sonobe version you would have to replace each triangle in the figure with triangular pyramids. https://upload.wikimedia.org/wikipedia/commons/0/0e/Conway_polyhedron_K6k5tI.png Also, here is a similar construction but not with Sonobe Units. It's with spikier units but the idea is the same. http://origamee.net/gallery/spiky.html The underlying structure is a buckyball. Hope all this helps. Meenakshi -- _____________________________________________ My Modular Origami Galleries: http://www.origamee.net