and
to AP
There's heaps of info on the web to assist with repairs and restoration. You can download most manuals from IPDB.org EXCEPT Gottlieb. If you buy a Gottlieb project, make sure it comes with a manual, or you will have to buy one from eBay or from Pinball Resource.
Parts for Gottliebs are easy to track down. If you keep to Gottlieb, Bally, Data East, Williams and Stern - you will be fine. Steer clear of Playmatic, Recel and Sonic. There parts are difficult to source. Zaccaria can be difficult as well, but Mike (Homepin) has the boards covered (soon) - so that opens new doors for these games.