They certainly do have very good made playfields in them.Mine always has a problem when you turn it on,most time something to do with those lovely terminals.
Did find this site helpfull, and i have a manual for a big town pinball,which i dont will help much but your got a great machine to get your teeth into.
http://www.flippers.be/playmatic.html

Cheers for that link wonder....but no EM info 

Has anyone out there got a manual for a Playmatic single player EM out there? There are some jumper settings that I need to suss out.