All - quick update. A good friend of mine purchased a 2020 G05 and also purchased a nearly identical Thule system to the one that I warned about earlier in this thread. His - no whistle. What changed?
Thule discontinued the Aerobar and now sell what's called "Evo WingBar" (looks like it was released in early 2019). These are nearly identical to the Aerobar - but have a more planar leading edge with a series of flat planes vs a rounded/bull nose. A few other nuances to the shape seemed to have resolved the loud whistling I experienced on my Aerobars.
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