The EZ Zome has a front/back - left/right, 4-way symmetry.
Photo of the basic icosa Edge Zenith structure is shown in the Icosa Dome Gallery
A larger version of the EZ ZOME can be made with maxium efficiency for covering a dome with size in the 28 ft diameter range. This is the EZ MAX Zome and it is derived from the dodeca geometry rather than icosa geometry. The Icosa struts are there as -X1 struts, with length 13 ft to make the larger zome. It is placed on a riser wall and given a cupola; see the Dodeca Max and EZ MAX Zome.