Based on a quick test the rigid insert transforms the ride, particularly on punchy climbs and sprints. Frame stiffness and geo seems on par with my Roubaix, even with considerably wider tires.

Drivers for making the switch:
- Stiffen up the front end for out-of-the-saddle efforts
- Get more aero with lower stem and bars
- Lighten up the build by ~1.5-lbs

This isn't exactly a weight weenie project, even if the frame itself weighs ~950g, but dipping under 17-lbs with 38mm Rene Herse rubber and lighter/shallower carbon wheels will be fun. Previous 1x build was 18-lbs on the nose with Zipp 404s and Schwalbe 35mm G-One Speeds. FS weighed 360g, so the swap to the 7075 plug will save 1/2-lb alone. Also changed the seatpost to the moderately flexy S-Works Pave, which saved 200g over the original Command XCP dropper.

Will update with a pic once I dial in the front end with the replacement rigid insert I'm getting. Kudos to the eBay seller. He knows his stuff!