UPDATE: One of the three musketeers was killed in action about a month ago and sadly it was mine (the orange, blue, and black frame).
The frame was cracked on the right seat stay in two places.
I need to stress at this point that it was not a fault of the frame, but instead a mistake/accident on my part.
I was riding at about 2-3 mph and went to bunny hop up onto a curb. My right foot wasn't clipped in properly and slipped off of the pedal. I came down with my the arch of my foot on the rear seat stay. Since I was rolling forward, the rotating wheel caught my heel and forced it down in between the spokes and the seat stay. I felt my foot getting caught and heard a crunch. I've never heard carbon crack before, but I knew instantly what it was.
I ended up riding the bike 10 miles home without issue except for a popping noise when pedaling.
It feels like losing a friend. I've had this bike for 3.5 years now and put thousands and thousands of miles on it. I was riding it 9 to 12 hours a week for the entirety of 2015. And plenty of riding in 2016 and 2017 as well. Everything from road rides to rock gardens. I could not be more pleased with the 256-SL frame.
I have contacted Peter. The CS-256-SL is out of production now. He had a single one left in stock, but I decided to upgrade to the CS-218-SL with the improved seat stays and thinner seat post. I'll have a build thread up soon.
Here are some pictures of the breaks: