Dual monitor arm/cradle prototype STL set for PLA

Generated parts:
- pole_clamp_left_half_35mm_pole_M4.stl
- pole_clamp_right_half_35mm_pole_M4.stl
- arm_180x20x20_M4_pivots_PRINT_4.stl  (print 4 copies)
- open_monitor_cradle_180x25x15_M4_pivot_PRINT_2.stl  (print 2 copies; mirror in slicer if required)
- M4_pivot_washer_12x2_PRINT_AS_NEEDED.stl

Key dimensions:
- Pole clearance: 35.6 mm for a 35 mm pole.
- Clamp bolts: four transverse M4 channels, not longitudinal/vertical holes.
- M4 clearance holes/channels: 4.5 mm nominal clearance.
- Link arms: 180 mm long x 20 mm wide x 20 mm high centre body.
- Arm pivot tabs, clamp pivot bosses and cradle pivot tabs: 8.0 mm matched thickness.
- Cradle: 180 mm long, 25 mm high, 15 mm internal monitor slot, 4 mm walls.

PLA print notes:
- This is a prototype, not a certified load-bearing monitor mount.
- Use high infill/perimeters for load-bearing parts, e.g. 5+ walls and 50-80% infill.
- Print arms flat on the bed so layer lines run through the length/width, not across the bolt load path.
- Use washers under M4 bolt heads/nuts.
- Test with the monitor supported by hand first; do not leave valuable equipment unsupported until physically verified.
- If monitors are heavy, use PETG/ABS/nylon or metal reinforcement rather than PLA.