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« on: November 18, 2017, 07:29:41 PM »
The 057 has an internal carbon tube running inside the frame. I had similar problems from day 1, I think I caused my initial issues by trying to drill in plans of installing full length cable. Initially things didn't go well, so I stuck with original routing, but I always had shifting issues toward the top of the cassette.
I recently drilled out the holes completely to run full housing. It was very difficult to get the new housing in place. As someone else mentioned, I think the internal housing may not be strong enough and flexes. There may also be some imperfections that cause drag.
All said, I don't have a good solution