The author remixed this model.
There were super tiny tolerance issues that I encountered with @salbang's mod, so I re-made the selector model using SuperSlicer. I wasn't able to use some sort of CAD program since both the original BinkyRack part as well as @salbang's modded versions are not manifold/"watertight"
I simply cut the BinkyRack and original TradRack models at Z=28mm and joined the upper and lower pieces of each; see the .3mf
files to understand how the two parts fit together.