  This paper is a supplement to Guo-Ram arXiv:2104.02942, containing examples,
remarks and additional material that could be useful to researchers working
with Type $GL_n$ Macdonald polynomials. In the course of our comparison of the
alcove walk formula and the nonattacking fillings formulas for type $GL_n$
Macdonald polynomials we did many examples and significant analysis of the
literature. In the preparation of Guo-Ram arXiv:2104.02942 it seemed sensible
to produce a document with focus and this material was removed. This is paper
resurrects and organizes that material, in hopes that others may also find it
useful.
