Mentioned this in another thread, figured I'd post it up.
52 cm Tarmac SL8 Pro frame, I built it up as follows:
Rival shifters/brakes
Force cranks, chain, cassette (10-36) and derailleur (XPLR)
Alugear chainring (46t)
Enve AR bars (40cm)
Pro Stealth saddle
Light Bicycle WR45 rims on DT Swiss 240 hubs
Conti GP 5000 S TR tires, previously 28mm, currently 30mm (measure an actual 33mm) run in the mid/low 50's psi.
Weighs 15.9lbs fully built with pedals, cages and GPS mount.
I'm almost always between sizes, and through some trial and error, finally realized I prefer the smaller frame with longer stem than the larger frame with shorter stem. I'm running a 100mm stem, which is hardly long for road, but it's longer than what it came with. Haven't decided if I'll go the fully integrated bar/stem route, I really like my Enve bar.