I'm running a Sram Red Etap 11s drivetrain on my VD Hellafaster. 52-36 rings and 11x28 cassette. When in the big ring, and say... 22, 25, 28t cog, the drivetrain is very noisy. I know, I know, this is cross chaining, a nearly mortal sin. Sometimes, the chain will drop off the inside of the 52...