  Symmetry indicators are a modern tool for characterizing topological phases
that require only minimal computational expense but provide an elegant means of
designing practical devices. This paper demonstrates how a rotational symmetry
indicator can be used to construct and characterize a topologically robust
waveguide, which is then verified experimentally on a printed circuit board
(PCB) platform. The design takes advantage of the real-space gauge-dependency
of the symmetry indicators and adopts a $C_6$ lattice with simple shifts,
forming a defect line supporting topological edge modes. It is shown that the
modes can realize the same features as previous topological waveguides, but in
addition possesses a greater degree of reconfigurability and the unique ability
to form a one-way termination. Moreover, the design illustrates the critical
role real space information plays in determining the topological properties of
photonic crystals, enabling a wider range of possible realizations.
