We haven’t ridden the Carrera since before my last post, but hope to in the week or so. I am pretty much convinced it’s the frame combined with the cluster spacing of 11 speed. A new frame would be nice, but as you said, it’s expensive and we would always be “waiting “ for the ghost shifting to occur. I still will try and capture video as there should be something for us to learn or satisfy our curiosity.
as my head clears of the frustration I think the plan will be to figure a way to get 10 speed hydraulic on the Carrera and build up a nice half bike With the Etap for yours truly.