Update:
After ~1,000miles , the wind deflector is not a cure for wind noise.
I've adjusted the deflector to multiple positions.
It does seem to help. At least the pitch of the noise is different...
The cure is for me is no windshield at all. But that means I would be covered with bug guts.
If I stand on the pegs so my head is in the clean air, the wind noise noticeably decreases.
jb