I have just put new Dura Ace Di2 11 speed on my 10 speed FSA 52/36T chainrings running on Rotor/Power2max Cranks. 3 rides so far and I have had a few issues with the chain slipping of the small chainring so not totally happy. Anyone else had any experience with 11 speed on 10 speed chainrings? I don't want to go to the Dura Ace cranks as I want to keep the power meter. Any suggestions?