The Zome Model of the First Stellation of the 120Cell, page 4
8. Make 60 of the assemblies shown, where one medium yellow and one medium red are connected to one ball at an obtuse angle. This uses 60 balls, 60 medium yellows, and 60 medium reds. 

9. Attach these as shown. Notice in the photo that the red strut is connected to the green ball, where a total of 5 of these assemblies meet. The yellow strut should connect naturally to the vertex of one of the squat pyramids constructed earlier.. 

This is how the model should appear after you complete step 9. 

10. If these 60 pieces were attached correctly, there should be a natural way to attach 60 medium blue struts to form a total of 12 regular pentagons. One of these pentagons appears in the photos. This uses 60 medium blues. 

This is how the model should appear after you complete step 10. 