The top cam on a '62 Gottlieb Olympics I am working on is unattached from the cam shaft. Anyone know if these were pressed onto the shaft or attached some other way? It looks like it has been this way for a long time as it has worn a groove where the cam contacts the switch dog. Right now the only thing keeping the cam on the shaft is gravity and pressure from the switches. I see no way other than maybe epoxy or soldering that I can reattach the cam. Also, if a donor cam and shaft is required, are they all the same game to game?20150716_095858.jpg20150716_095915.jpg20150716_095840.jpg