CDSL Bridge: Bearing Bore Seat

Build enough support material first, then cut the smaller shaft clearance and larger bearing seat on the same frame.
Use a defined seat depth and shoulder; never collapse both diameters into one hole.
Express coaxial cuts with explicit frames or a stable reference axis/plane. Mounting holes follow the seat relationship.
If a selector cannot identify the seat face uniquely, stop the dependent feature and report the blocker.