I've got the spacers and have ridden w & w/out. My stock screen has a Tourtech adjustable lip, which raised to the 'up' position, is approx 4" higher. I took a small 150 mile ride today, swapping the spacers back/forth and playing w the lip position...... it was slightly better w/ out. With that said....I think a lot of buffeting is coming from the narrowness of the screen. Most of my ridding consists of long day rides and 3-10 road trips. BTW...I'm 6'1" w/a 32" inseam.