does a bladed headtube really do all that much for aerodynamics? if it did, wouldn't other companies, such as look or cervelo do it as well? it's probably easier to do it in CF, which makes me wonder why look hasn't done it yet. with Ti or Al, it has to be welded, which would add more heat stress and more weight, for not too much advantage. it would make more sense to me to just have a plastic clip-on aero thingy that you could attach to any head tube...certainly be cheaper...though, just as silly.