I went with the entry level carbon and got the Elite (2016). My thinking at the time was that I can always upgrade the Sora drivetrain later. Now I am wondering if I have shot myself in the foot. Does anyone know if it is possible to upgrade to an Ultegra 11 speed on the stock wheel/hub? Wheel upgrade may have been in my future anyways, but it would be nice to know what I am in for when I get the itch to upgrade.