Actually, I think that lefties have an advantage when it comes to working on the front side of the head (EM or SS), because most light boards are hinged on the left side. As far as I know, most or all Bally, Williams, Stern, Data East and Sega games are hinged on the left, making it easier for a southpaw to lean over the playfield and work inside the head with their better hand. A righty must reach over his body and basically work back-handed. Gottlieb and Game Plan machines are hinged on the right, making it easier (IMHO) for a northpaw (?) to lean in and and use their best hand.

Anyone know why there are two different styles?

Matt, will all due respect, I have to disagree. Considering that AGC made only 8 games with production over 100, and with 2,544 units TOTAL produced between all games, those numbers would hardly move the split more than .1%. I see you're an Alvin G. guy, so I understand where you're coming from.

Seeing as how only Gottlieb of the three majors, and GamePlan of the smaller companies hinged their lightboxes on the right (as far as I know), I would say that at least two thirds of all American built machines were left hinged.