Being tallish, my head sits just in the turbulent air ("airmoil" to coin a word) coming over the top of the standard screen. Jules cut his down so he headbutts clean air, says it is better than std screen. Another wilddog (Wim from Pta) has a taller Puigh (sp?) screen which he swears by. I see that Aerotrim has a deflector for the "Z" (extending the screen in effect). Anyone had any experience with the Aerotrim (is it effective)?