WALKIE ONE v12.3 — COARSE THREE-SIZE HALFTONE W GRILLE AUDIT

Pattern: manufacturing-scale triangular lattice with hole size derived from distance to four W centerlines
Field diameter: 39.20 mm
Nearest-neighbor pitch: 3.20 mm
Perforations: 121 (previous supplied-art grille: 1129)
  Ø1.4 mm: 32
  Ø1.8 mm: 48
  Ø2.2 mm: 41
Minimum hole diameter: 1.40 mm — PASS against approved 1.40 mm floor
Exact minimum hole-to-hole web: 1.000 mm — PASS against approved 1.00 mm floor
Geometric open area: 327.26 mm² (27.1% of field; previous grille 32.8%)
Hole-count reduction: 89.3%
All holes remain fully inside the 39.2 mm speaker field: PASS

CAD continuity: PASS when MESH_VALIDATION_v12_3.txt reports zero open/non-manifold edges.
FDM process assessment: substantially improved; the smallest hole spans 3.5 nominal 0.4 mm nozzle widths and the minimum web spans 2.5.
Acoustic assessment: 27.1% geometric open area; physical SPL, frequency-response, buzz, and gasket tests remain required.