Cane Creek Hellbender 70 Zerostack Headset Complete ZS44/28.6/H8 ZS56/40 - BAA1186K

This is a step up compared to the CC 40, the split ring works more as a component with the cap so a little easier to work with. Same quality bearings as CC normally provides. No complaints, you get what you pay for.

I normally wear large, but bought a couple of these in medium for a more fitted look, and that worked great.