A modest project, I know. I'm contemplating the feasibility of a steel Indy Fab--Crown Jewel if I can get away with it, or the Factory Lightweight. This only if I can match the weight of my current ride, a 2009 54 Specialized Roubaix Comp with the component set below (about 17.3 lb). IF says the Factory Lightweight (with 50cm c-t-t ST) should be around 3 lb. Fork will be an Enve Road 2.0.

tia

Handlebars: Deda Zero100 42cm o-t-o
Stem: Easton EA90 -10° 13cm
Headset: Cane Creek 8mm stack/2.5mm spacer
Seatpost: Deda SuperZero
Saddle: Aliante Twin Flex ti
Pedals: Shimano Dura Ace PD-7810


Bottom Bracket: VCRC Road Ceramic
Crank: 2011 SRAM Force
Shifters: 2011 SRAM Red
Derailleurs: 2011 SRAM Force f/r
Gore Ride On cables
Chain: KMC DX10SC
Cassette: Shimano 6700
Brakes: SRAM Rival
Wheelset: Campagnolo Neutron
Bottle Cages: Arundel Sport

You can do the calculations with most of the stuff listed in the listing sections, but if you don't already have them you can asve quite a bit on the Ultegra Cassette and the Neutron's (though they are not bad daily wheels for 1550g)
Every thing else is fairly "weight efficient" for the price

Thanks for the resource.

After a quick search apparently the IF weight estimation should come in pretty close (3#). With a conservative Neutron-like wheelset like the new Kinlin XR19w/Alchemy, the overall weight should hopefully be around 17#.