Can you possibly post a pic and i will tell you if that is what i have then maybe together we can get some info. I threaded mine and it does work but my hands aren't working very well and i am having a hard time getting the bobbin latched in. That machine is extremely heavy too is yours? I thought the suitcase it came is was just something someone had put it in but turns out it is actually the case for the machine. Has lots of cool attachments too.