If Rho (or Gamma) is treated as being a magnitude with an angle which,
as one moves backwards along the line, may fall in any of the four
quadrants, all those futile arguments about whether or not to use Z or
Z* fall by the wayside.

Just proceed with calculations in the normal, mathematically
legitimate manner and you will arrive at the correct results or
conclusions.

If you disagree with results or conclusions, and there are no
mathematical errors, then it is YOU who must be wrong. It's all part
of the learning process.

And the magnitude of Rho CAN exceed unity.
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Reg.