I hear ya! Some might accuse us of getting dangerously close to counting angels on the head of a pin...I'm not really a SUL or even a UL adherent, but I do like the nice side benefits.
I made up an SLS replacing the ridge line there with a Lash-It! Whoopie Sling and that dropped the weight to 1.20 oz and the total to 3.2 oz. But then I lose the convenience of the Whoopie Sling adjust-ability. I'll keep the 1.4 oz and the super simplicity of the Whoopie sling.