The Great Circle Challenge - 60 piece 3D puzzle

Can you assemble this 3-D puzzle into a 9 1/2" sphere? There are 60 almost identical pieces that need to be assembled in a specific sequence - are you up or the challenge? 

Multitudes of possibilities can easily lead you astray..... can you stay on the right path?

The Great Circle Challenge is made of 15 intersecting Great Circles. A great circle is like the equator - it separates a sphere into two equal spaces.