Nice tutorial, but for me it didnt work properly because i placed the push modifier on top of the symmetry modifier i guess. An other way to get a nice wireframe render is using the composite material, use your normal material as "Base Material" and add a standard map with "Wire" checked to the Mat. 1 slot.
I attached a render in which i used both methods, the upper one is the one with the cloning method lower one the composite method.
I canīt see major differences