Well, guess i should have clarified. The usual roller rocker design, of which Yella Terra has as well as the everyday Harland Sharp line-up, is slightly heavier than the stockers, but yeah you're right, Yella Terra has their ultra-lite design or whatever they call it if i remember right that seems to be the best they got. I dunno how light they are in comparison to their "regular" design they have/had, but it's bound be an improvement.

:edit
Looks like Yella Terra only runs the improved design now, but I've seen some older(?) designs that were the stereo-typical roller rocker type. Whichever.