Does anyone else have this machine? If so, do you have trouble with the timing? My machine has been fixed by Singer twice and now they say that they are done. Each time I have had the machine fixed I sew about 15 minutes then it jams again. This leaves it out of time. So I have a very expensive box of junk in my garage. I have seen other posting on the internet about others having the same trouble, so I was wondering if any of you have had trouble.