I just got the Cee Bailey 21" shield, but don't think its right for me. I keeps wind off my chest OK but much buffeting/head boggle. I am 5'6" and have been reading all the posts on the Cal Sci, EVO, and the adjustable from Industries7 (CHAD?) i'm totally confused on which is which and what is the EVO, etc. Could some please explain what's what as far as the different names of the shields. Before I send the Ceebailey back I have to know what to order insead.