So this question has been nagging more forever. On my set of S-works Bars there are little "height" indicators for setting your brifters. Should these be measured to the bottom, top, or clamp of the brifter? I know it doesn't really matter all that much since they are more so that you can set them at the same height on each side but I notice that whenever I set my brifters I like to set them really high on the bar so that I can rotate the bar as far as possible downward.

Am I the only one that does this (Brifters really high)? And are markings normally supposed to be measured to the clamp? (I am just a little wary of setting the clamps too far away from the "Clampable" section and possibly damaging my pretty carbon bars).