It's each to their own to be honest
@Mustang Pete - depending on what is needed. If I were in your shoes, if I had to do anything I would,
- Strip the playfield down and clean all of the plastics and toys (something you have begun to do already by the looks of it)
- Replace all of the rubbers, if you plan on keeping for a very long time, track down a TITAN rubber kit, people such as
@MartinY and
@Neil McRae swear by them, they claim to have a much longer life cycle, although I personally cannot comment.
- If the game doesn't have an LED OCD board, track one down and fit that, along with a full LED of the game, there are varying kits available, my personal preference of supplier is
@philpalmer - but again, others are available and you have to find what is right for you.
- Detail clean of the game playfield with everything off, again, if buying LED's from Phil, he can supply a Novus set.
- Clean all the switches, this will involve some Isopropanol alcohol (IPA 99.9%) a cotton bud and just clean the switches off, particular attention to the slings.
- Re-set any duff switches in the game, main switches set ensuring a hit registers, you can use the switch test menu to check this with the game on.
- Pay particular attention to the slingshot switches, some people like them to go off if the ball brushes past, some like them a little more forgiving, find your level and adjust as so.
- See if you want some sideblades from
@PeteB - he does a discount for members, I can tell you the quality is excellent.
- Get some wax for the game, give the playfield a wax.
- Re-assemble.
- Check the code is the latest version, one would assume on an older game it is, but always worth checking.
Once re-assembled, certain targets, or elements might require re-dialling in, having not owned a SM, I don't know the areas of the game that require specific attention.
Hope that helps, I am sure others will add their experience on what else may be worth doing.