When the top thread is looping on the bottom, it's usually a problem with the top thread. If your dealer isn't having the same problem, it may be user error. Looping usually means the top thread has jumped out of the upper tension. It could be making a "ping" noise underneath, but the problem could still be on the top. What thread are you using? Does it have a slit in the spool that the thread could get caught in? Are you using the thread extender?, and is the thread extender pulling thread straight up, not slightly to one side? Make sure the upper thread path doesn't have anything that the thread will tangle on -- like an attached pincushion or light. Sounds like it would be a good idea to do a "sit-down" with your repair tech. The 2010 is a great machine, and you shouldn't have that kind of problem with it. It's made to go fast, so no, it's not likely that the problem is going too fast. If it is catching on the bottom, it could be a burr on the hook, or the thread cutter gets bent or tangled with thread (both of which the repair tech should have caught). Good Luck!