An experienced builder gave me this tip-when glassing a wing-which he always did-start with a 1-1/2" strip, then add a 2-1/2" strip-and then add a 3-1/2" strip using 3/4 oz cloth-this way the edges are hidden and you get a nice taper. Course the weight of cloth and strip widths would vary based on size of aircraft, but you get the general idea. Most of the time the center seam needs to be covered over anyway, so why not glass?? Sure adds a lot of strength for very little weight. Kinda of like-do you need shear webs in a wing-lots of strength for very little weight. I am all about building light, but also having a strong aircraft that can take a few "wild rides".