That's good advice IME. Screens are always a compromise. Either fugly and huge, creating a vacuum to pull you forward, (ike a sports car, hair blowing forward) or you get increased wind noise. But the worst is the vibrations of buffeting. I've suffered it before and made improvements in two ways in the past, significantly increasing the rake of the screen, to smooth the airflow, or cutting the screen down, I guess so the buffeting is below the helmet level and unnoticeable. I've found the clip on top visors help reduce noise, but never prevented buffeting for me.
There are so many variables causing this: rider's body height, helmet designs, how you sit (upright, lent forward), airflow around and from beneath the screen etc. It needs experimenting with. Loads of miracle cures on UTube, but too many variables to work every time for everyone.
I've just put a Puig 'up & down' screen on my Z900RS and its spot on. Good attack angle, giving protection and adjustable. It's German tuv approved and has wind tunnel testing results on their web-page. I was a bit sceptical, but gave it a go. It's good. I can solidly recommend it, but that's my height, posture and a different bike! if you ever feel tempted to go aftermarket have a look at their website, you can put your bike model in to search for their products.