Cool, thanks. The stock mirrors are truly terrible. After riding home from the dealership I though, "Whelp these have got to go." So I installed the mirror deletes from mnnthbx, and started looking for bar ends.
Carbon is actually a little denser than plastic so it might be slightly heavier, assuming the same general shape and thickness, but it's just a cover so it can't be significant.
have you had them both in your hands big_sur? The carbon cover is thinner than the plastic and feels like it weighs nothing compared to the plastic tank which is considerably thicker and yes heavier ;-)