Finished the build under 5kg/11lbs and rode 20km on it. It rides great but I think a bit shorter stem and a more flat bar angle would be better. These bars are not very comfortable for riding on the tops because of the downward swoop.
The Cannondale top cap needed some filing on the upper fins to get them to fit into the steerer tube.
On these rims the tires measure 25 and 26.5 mm which is awesome for sub 1300g wheels. I wonder how wide the puncture stip is and if the extra tire width makes punctures more likely.Link to Imgur album with more photos
Xpedo R-Force Ti XRF06TT single sided SPD pedals are 164g for the pair and around $160 on eBay. I wouldn't recommend these for most people riding SPD but for weight weenie purposes they work great and are very light.