Optical QC: one station for both presses, after the cooling racks

User, 18 Oct 2026: for now one QC station for both machines; let the
records cool in a queue before testing them.

- inline-optical-qc.md "Where it sits": launch setup. Spindle stacks
  from the Duplex system and the Classic, labelled at the press (press,
  stamper set, first and last cycle), cool in FIFO racks (24 h accepted
  practice, 8 h at the shortest, Stamper Discs; about one day of output,
  2,800 to 3,100 records); the finishing operator feeds the station from
  the cooled stacks. Gains: warp and centring measured on settled records
  (the release value), one station instead of two, no Classic unloader
  change, no warm-record sag or thermal camera. Cost: defects found hours
  later, covered by the Duplex operator, per-cycle telemetry and an early
  lane for the first records of each run and after stamper changes.
  Record key from the stack label and stack position, checked against the
  run-out stamper number. Capacity 10 to 12 a minute against 5 to 6:
  one station to about two Duplex systems and two Classics. A station at
  each press stays the later option. Cost table, open points, infeed row,
  thermal camera note and the Newbilt question follow.
- Fleet calculator: the per-press stations and the release station are
  gone; the finishing block shows the cooling racks with record stacks
  and the one optical station by the corridor glass; tooltips, corridor
  and conveyor texts; machine park back to its legend, finishing box
  "cooling, QC, packing".
- quality-automation.md layer 1, digital-factory.md QC row,
  process-flow.md stage 6, site-candidates.md block ground floor,
  crane-workshop-tours.md tour stop 6.
- Investor render: infeed label "the operator sets each cooled record
  down".

Checks: node --check; pw_bp_calc.py 0 fails; pw_iso_view_check.py OK;
info for every data-id at all presets, levels and rotations; GF nodes
2,414 at the full preset; zoomed shots in two rotations.

docs/quality-automation.md

@@ -135,14 +135,17 @@ optical inspection is a strong proxy for audio quality without playing the
 record.
 
 No vinyl-specific vision product exists (search of October 2026); this is
-a custom integration of general machine vision at the press unloader, on
-the pattern of the old CD and DVD in-line scanners: one turn under a
+a custom integration of general machine vision on the pattern of the old
+CD and DVD in-line scanners: one turn under a
 radial line-scan camera with angled lights, plus laser distance sensors
 for warp. The closest vinyl precedent is Precision Record Pressing's
 in-house AQA (2023), which scans sampled records with cameras in the lid
 of modified turntables before playing them. CNX would be an early
-adopter, and it should be budgeted as an integration project. The device
-options, a station design, prices and a cost estimate are in
+adopter, and it should be budgeted as an integration project. At launch
+one station checks every record of both presses after the records have
+cooled, at the start of finishing, with an early lane for the first
+records of each run. The device options, the station design, where it
+sits, prices and a cost estimate are in
 [inline optical QC](equipment/inline-optical-qc.md).
 
 ### Layer 2: press telemetry, every cycle