I think u are best doing everything and anything u can do to the machine cleaning wise etc.

Then, at the very end, any thing which needs doing, that u cant do, post some photos n questions on here, have a like minded Aussie Pinball member come over to your place with a carton in hand, get some technical help etc and then your machine should be AOK and ready to go, finished.

If not, u can do every thing u can do, and drop the machine off for a service (electronics wise) to one of a number of people and have it sorted that way.
Someone like Nino(Strangeways) shld know what he is doing and have your Star Wars kicking along nicely in no time for little money so to speak, pro-rata. My 2cents worth.