Per our convo. with @sjcorne above, I decided to do some tinkering with "Almost Lucy"
I first took the Right Rear channel and did a Vocal Isolation in RX 8 Music Rebalance.
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Then cleaned it up a bit in Audacity and Inverted it ...
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Then Merged back into the Right Rear and replaced the original RR (some minor artifacts remained noticeable, but primarily when listening loud with isolating the Right Rear )- but definitely puts his vocals back to center and leaves mainly conga, cymbals, keyboard & guitar echo in the Right Rear ...
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Nice job Pupster! Woo-Hoo