I've got the same thing happening to me right now! the inner plastic thing hangs low and always scrapes on the ground while the upper part rubs against the tyre. already pretty damaged on both ends. Do we really need those plastics? any harm in removing them?
as for the cooler itself, perfect. I run 10 pounds and i get no heat soak. I dont have the air guides either, but the s2 front bar has an opening right in front of the cooler.