I bought the 430 a few years back. Used it quite a bit at first, was comfortable with the BSR and the machine, then got busy with life and didn't use it for a year or so. OMG I felt like an idiot. I started using it again after my dealer finally had weekend classes. It's like riding a bicycle, it comes back to you real quick. I thought my bobin winder motor was out....called the dealer and found out my motor speed affects the bobbin winder...duh!!!! I think most of the dealers are very helpful and want you to master the machine. Anyway, we all feel stupid at times, just get it out and use it!!!