Report "I just bought an old Pfaff 206 and the machine sews about ten stitches before it just completely jams. I double checked the threading, and the bobbin, both are correct. (I'm sorry I don't know the correct terminology, I will try to be descriptive.) I watched underneath as I turned the wheel to let the needle down, and each time the needle descended the top thread was getting caught on a sharp point (part of the bobbin holder area). I took off the outer plate that holds the semi-circular inner ring in place, and tried multiple times to reinsert the semi circle with the sharp point, but each time the machine's rotational timing is just such that the thread loops around the sharp point and gets carried forward until everything jams and even the needle cannot be extracted (when sewing fabric). I can't think of anything to do that would change this timing: do I need to take the machine to a specialist? I'd appreciate any advice as this is really a lovely machine and I'm looking forward to using it. Thanks in advance!"