So what's the deal on lock down bars front edges? Is this a Williams thing that changed at some point in the 80's or different vendors supplying them?
I have a pair of SYS 11's that came with them where the front edge dips into the cabinet (And seems more likey to scratch artwork) and most of the WPC eras of machines I've had/or have are flush. My old FH has the front edge dipped one but I know these can be used interchangeably.
FH with indented front:
NGG with flat front: