  The field of Quantum Hall metrology had a strong start with the implemntation
of GaAs-based devices, given that 2D materials systems provided access to
interesting quantum phenomena, including the infrastructure associated with
making relevant measurements. With the technology laid out, further
improvements in both infrastructure and standards were achieved in the previous
two decades as EG-based quantized Hall resistance (QHR) devices became
established as national standards. Since the metrology community has reached
some understanding that a comparison against GaAs-based QHR devices had been
accomplished, the next steps became clearer as far as how the EG-based QHR with
a single Hall bar could be further developed. Since the early 90s, it has been
of modest interest that QHR devices have a means of interconnecting several
single Hall bar elements and has since been a subject of research. NMIs are now
presently at a juncture where consideration must be granted beyond just
simplicity of operation. A natural direction for resistance standards would be
to increase the total accessible parameter space. This means using EG-based QHR
devices to output more than the single value at the $\nu = 2$ plateau (about
12.9 k$\Omega$). A first natural question is whether one may use the $\nu = 6$
plateau or $\nu = 10$ plateau, and though some work has been done with these
Landau levels in graphene, they simply do not offer the same level of precision
as the $\nu = 2$ plateau.
