Dewey - can you explain this in a little more detail: "inboard mounted sidelocks with either hinged or windowed false lockplates"?
Bertuzzi did this on their "Gullwing" guns. Imagine the lockplates' swapped left for right and mounted toward the centerline of the gun, then a hinged, false lockplate covers the works. Here's a photo.
I'm also considering leaving the "false" plates fixed and incorporating a window to show off the lockwork. Something like a Scott-style cocking indicator but larger. The windowed lockplate idea would more easily compatible with a sidelever but I've always liked the Gullwing idea.
I've also always believed that the sidelever is ergonomically superior to every other method of opening a break-action gun.