# Russ Gries and Raymond Aschheim

The Quasicrystalline Spin Network is the Planck scale substructure
of spacetime QGR envision as the quantum substrate. The Fibonacci
IcosaGrid was designed by Fang Fang in 2011 as a quasi-crystal with
icosahedral symmetry made of regular tetrahedra, which meet at some
vertices by groups of 20 . Ray connected them together as a Spin
Network on which QGR develops a Topological Quantum Field Theory,
and computed the base model for 3D printing. Russ optimized it to
realize the impossible: print it with a home-made custom Delta-style
FDM (FFF) printer, using minimal support only for the base. The file
will be shared with the open source printing community as a stress
test. This art and science piece costs less then 25 cents of
recyclable PLA.