Hello fellow members. Am thinking of trying out the Gee fenders for our district race. Is there any advantage to using these over balsa fenders other than they're already shaped very thin so there's no need to sand them? I noticed they are hollowed out also. Is this for adding weight? And does the shape of the body have any advantages over others while using the Gee fenders? Ex. Wedge vs a 3/8" body from front to back? Thanks in advance.