I wonder if Colnago knows the answer to the question of how light is too light. That might explain why they haven't gone lighter as you friend pointed out. A number of years ago the mountain bike manufacturers went through a weight weenie phase of their own. I think it was the large number of catastrophic failures of lightweight handlebars that brought about the phrase "stupid light". I've always wished I'd thought it up. Every time I see a video of a carbon bike coming apart right behind the headtube, I think the manufacturers have found "stupid light".