Lathe Carriage Stop Multiple with unlimited number of stops. Cartridge Design

[Toolmaker51]

As mentioned, very creative solution and completely original. Only thing close, are micrometer trays as with jig bores, but are reset for each move...yours beat that! Another positive is; with a part stop in workholder, dimensioning is not degraded by incremental positioning.
Saves a lot of 2nd operation/ rework/ inspection by holding to a single datum.

I see in picture 3 what appears holder for travel indicator. Nearly same method I use to locate a hard stop. You could make a long nut [coupler] to hold indicator point short from where hard stop contacts carriage.