Owner didn't have time to drop off but can pick up when he gets back from work in two weeks. I don't think he is very interested in servicing himself just wants to leave it up to the people who have the right tools, knowledge, parts on hand and know what to look for. I believe the machine is a bit of a family heirloom that has been handed around and as such maybe not the same sort of passion to rip into it as much as you or I would.
As for the "lube" job, I'm guessing a drop of oil on the ball shooter assembly and all the metal to metal pivot points on the slingshot, ball shooter/lane feeder, outhole kicker etc. Perhaps some door jam grease on the playfield sliders.