I didn't notice any other meshes. Everything to do with the gems and track are in a single milo. Perhaps there might be other unused geometry in other milos, or even possibly in the similar .gh files found in GH1? My buddy PikminGuts92 has done some amazing work lately in making some of these things more easily viewable.
SCPH-39001, Free HDBoot 1.953, OPL r1051 via 250GB HDD (all retail GH/RB games plus customs) - no memory card needed
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