Single-point boring and reaming are both excellent ways to meet high tolerances and finish requirements for hole making, but each has distinct specialties.
In-machine probing doesn’t reach the power of CMMs but can still be useful for pre- and mid-process control, as well as for “rough screening” of parts.
Milling a deep pocket with a tight corner radius comes with unique challenges, but using both a flat bottom drill and a necked-down finishing tool can help.