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See this tutorial for some comments on obtaining nets for building paper models of 4D polytopes.
To ensure a robust model, I printed nets for a complete great stellated dodecahedron (yellow) and built other parts around this.  
About halfway here. It's not too hard to put together.  
The above stage upside down.  
Here are all four gishi crosssections taken at hyperplanes
which pass through successive vertices of the polytope, built at
appropriate relative sizes:


And again with the city of Melbourne, Australia, as a backdrop.  
Here's an animation of the gishi crosssection as the slicing hyperplane moves through the model. Can you spot the four crosssections above? 
Home > Gallery > My Models > 4D CrossSections > 0.25 CrossSection of Great Stellated 120Cell  
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