My alloy/carbon frame quoted at 1.3kg my size. Waterford are the only ones to my knowledge claiming steel at under 3lb. So what replaced what, and what were the weights?

Just out of interest, of course. The lightest carbon racing frame at 2lb and the heaviest steel racing frame at 4lb differ by about 1/8th of the amount of weight I could happily lose from my own well padded frame, and I suspect there's very few here within 2lb of their ideal weight.