I loved your site. The weight page was quite informative. I went through a similar process with weighing my bikes on a bathroom scale but finally broke down and got a digital fishing scale. You are certainly correct about the difference the bike's setup makes. When I first setup my '73 Bottecchia with tubulars, NR rear derailleur, and an Unicanitor saddle it weighed in on the bathroom scale at 22 1/2-lbs. It was also over-geared for Colorado, moderately uncomfortable to sit on, and prone to flatting darn near every ride. I reconfigured it with period alloy clincher rims and Panaracer Pasela TGs, a Campagnolo Rally long cage derailleur with a monster 14-34 freewheel, and a Brooks Team Pro and the weight jumped up to 24lb 12oz (with the digital scale). But now it is quite comfortable to ride, is geared to handle any hill, and never flats. The complete clincher wheel/tire setup was 420g heavier each or almost two pounds and yes, it was quite noticeable compared to the tubis.

To offset the extra weight on my ride to the summit of Pikes Peak in a couple of weeks I've lost 22-lbs off me