A couple years ago I did a race here in Colorado. The next day a friend of mine and I were riding when my rear hub started making some terrible noises and intermittently going fixed gear. Being intimately familiar with i9 hubs having built and serviced many of my own i9 wheels including this wheel which was 2 months old at the time, I knew something was broken. I went to a highly recommended shop to simply borrow/rent a lockring tool or have my cassette removed so I could pull the driver body and dig out whatever broken bits were in there, thus salvaging my weekend. Their service guy assured me that the hub just needed a $35 service and in so many condescending words said that's all they were willing to do. Ok, some shops aren't keen on loaning/renting tools, whatever. I agreed to the service and later received an apologetic call informing me that they did indeed find a broken drive ring tooth floating around in there. Gave me a reduced service rate and I was on my way. I figure bike shops probably have to deal with a lot of goons that think they're experts. I get it. Hell, I dont get along with most cyclists, but its also why I avoid shops unless I really need em.