I never use a sunshade, unless forced to, like sun coming directly into the scope, at an organized rifle range, with fixed positions...out here I just change positions, and shoot from a shaded position, never even consider a sunshade, they are always left behind.
Never purchased one that didn't come with the scope. And only one was ever used, once, when I had to go to the dreaded rifle & pistol club to shoot, with fixed positions directly facing the sun.