Almost sorry I let the seller know I was going to pass. Probably good I get my feet wet with the lovely15-91 I just acquired. Going to arrange a service call for her for a check up and to verify what will need replacing and how soon (wire-wise). There is someone in my area that services these machines (and others). They do housecalls, so I don't have to figure out how to get it out of the cabinet. I will be watching everything he does and asking lots of questions!
Then I will feel more confident in the future with cleaning and doing a bit more on my own machines.