I have an Artisan Toro 4000R. I bought it new some 6+ years ago and its been sitting for approx 5. I moved and my skills have gone from mediocre to crap.To top it off my machine is hanging up in the bobbin something cronic. Sewing doesnt look bad on top but underneath it's a mess. I need some type of troubleshooting assistance badly. Can anyone give me some kind of direction?