First off, Happy Holidays to the Britt and the Golfworks team on another great year. I recently put a Rapport CB in my KE4 TC, and it has been phenomenal! What a solid mid flight, low spin blue board style shaft. Really pounded this combination last several times out.  My biggest concern now is that if I cave in my KE4 TC head,  I am not sure which head I will replace it with. I guess the KE4 Max head, maybe the Pro head at a higher loft setting. I guess the 2026 new driver is still a ways away. That Rapport shaft is quite solid.