It is a happy ending - I'm going to take it back for the owner to finish the work herself. Can't ask more than that! I was a little nervous at first, figuring that I was getting a 'free' service in return for a donation of canned goods for the homeless.
I was interested to read the various experiences people have had. I suggest you all check to see that the work was done, as mistakes can happen.
If I had a mechanical machine I think I would not be afraid to unscrew it and give it a try, but the electronic part worries me too much.
Thanks for the encouragement - good luck with your maintenance/repairs!