I am also curios if someone found Circus Manual / Schematic PDF. Starting the restoration of a Circus and it would be very helpful to have it!
FWIW, the replacement pins used on the double row edge connectors (interconnection between CPU and Driver board and also from Driver to playfield) don't seem to be available anywhere so I purchased some EDAC 0.156" double row edge connectors to replace mine. If someone has a source for these pins let us know, Great Plains Electronics is out of stock with no replacements in site... Thanks!