If you're having a wind noise issue with the Rev Platform X (some customers with smaller roofs / cars can hear whistling when the platform is mounted towards the scoop of the wind shield) -  A C6 Outdoor wind deflector made specifically for the Rev Platform X is in development now.   

In the mean time -   

We've tested the Front Runner wind deflector - it's a bit overbuilt and $$$, but it works -   https://www.frontrunneroutfitters.com/en/us/wind-fairing-1165mm.html

And we've also tested this one from Amazon:   It's plastic but only  $69