I kind of wish Stern had a network of techs in major city areas that specialized in Sterns and could do house calls. I'm fine paying with the service. I can do some basic work myself. It's convenient for me because it's difficult to call their tech line when I'm off because I can't be at the machine while I'm work. Also they are leading me through something I am vaguely familiar with.
Something as easy as contact form to put in your zip code, then here are the tech people in your area that you can get in touch with.