AI CAD prompt: Ventilated PCB service carrier

Create a new owned Nora3D part document. Use millimeters, world XY as the base and +Z as height. Retain named native features and expose only the controls listed below.

1. Create **Deck**, a 110 × 85 × 5 box, centered at X=0, Y=0, with its bottom at Z=0.
2. Create **Left cable rail**, a 8 × 70 × 13 box, centered at X=-49, Y=0, with its bottom at Z=5.
3. Create **Right cable rail**, a 8 × 70 × 13 box, centered at X=49, Y=0, with its bottom at Z=5.
4. Create **Connector guard**, a 70 × 6 × 22 box, centered at X=0, Y=-39, with its bottom at Z=5.
5. Create **PCB post -29 -24.5**, radius 4.5, height 8, initially along +Z, with its base center at (-29, -24.5, 5).
6. Create **PCB post -29 24.5**, radius 4.5, height 8, initially along +Z, with its base center at (-29, 24.5, 5).
7. Create **PCB post 29 -24.5**, radius 4.5, height 8, initially along +Z, with its base center at (29, -24.5, 5).
8. Create **PCB post 29 24.5**, radius 4.5, height 8, initially along +Z, with its base center at (29, 24.5, 5).
9. Unite **Deck**, **Left cable rail**, **Right cable rail**, **Connector guard**, **PCB post -29 -24.5**, **PCB post -29 24.5**, **PCB post 29 -24.5**, **PCB post 29 24.5** as **Carrier blank**. Require one connected result.
10. Create **Pilot -29 -24.5**, radius 1.4, height 10, initially along +Z, with its base center at (-29, -24.5, 5).
11. Create **Pilot -29 24.5**, radius 1.4, height 10, initially along +Z, with its base center at (-29, 24.5, 5).
12. Create **Pilot 29 -24.5**, radius 1.4, height 10, initially along +Z, with its base center at (29, -24.5, 5).
13. Create **Pilot 29 24.5**, radius 1.4, height 10, initially along +Z, with its base center at (29, 24.5, 5).
14. Create **Deck vent -24**, a 8 × 30 × 8 box, centered at X=-24, Y=0, with its bottom at Z=-1.
15. Create **Deck vent -8**, a 8 × 30 × 8 box, centered at X=-8, Y=0, with its bottom at Z=-1.
16. Create **Deck vent 8**, a 8 × 30 × 8 box, centered at X=8, Y=0, with its bottom at Z=-1.
17. Create **Deck vent 24**, a 8 × 30 × 8 box, centered at X=24, Y=0, with its bottom at Z=-1.
18. Create **Tie channel -49 -22**, a 12 × 5 × 3 box, centered at X=-49, Y=-22, with its bottom at Z=9.
19. Create **Tie channel -49 22**, a 12 × 5 × 3 box, centered at X=-49, Y=22, with its bottom at Z=9.
20. Create **Tie channel 49 -22**, a 12 × 5 × 3 box, centered at X=49, Y=-22, with its bottom at Z=9.
21. Create **Tie channel 49 22**, a 12 × 5 × 3 box, centered at X=49, Y=22, with its bottom at Z=9.
22. Create **Connector bay**, a 30 × 12 × 12 box, centered at X=0, Y=-39, with its bottom at Z=9.
23. Create **Mount -40 -35**, radius 2.5, height 8, initially along +Z, with its base center at (-40, -35, -1).
24. Create **Mount -40 35**, radius 2.5, height 8, initially along +Z, with its base center at (-40, 35, -1).
25. Create **Mount 40 -35**, radius 2.5, height 8, initially along +Z, with its base center at (40, -35, -1).
26. Create **Mount 40 35**, radius 2.5, height 8, initially along +Z, with its base center at (40, 35, -1).
27. Subtract **Pilot -29 -24.5**, **Pilot -29 24.5**, **Pilot 29 -24.5**, **Pilot 29 24.5**, **Deck vent -24**, **Deck vent -8**, **Deck vent 8**, **Deck vent 24**, **Tie channel -49 -22**, **Tie channel -49 22**, **Tie channel 49 -22**, **Tie channel 49 22**, **Connector bay**, **Mount -40 -35**, **Mount -40 35**, **Mount 40 -35**, **Mount 40 35** from **Carrier blank**, consuming the tools; name the result **PCB carrier**.

## Public controls

| Control | Default | Range | Step | Meaning |
| --- | ---: | --- | ---: | --- |
| Connector clearance width | 30 | 24–42 | 1 | Width of the opening in the front guard. |
| Connector clearance height | 12 | 8–14 | 1 | Height above the fixed lower edge at Z=9. |
| Reference pilot radius | 1.4 | 1.2–1.8 | 0.1 | Fit trial for the front-left post; the other three pilots remain 2.8 mm in diameter. |

All unlisted dimensions, topology and feature order remain fixed. Radius controls are radii, not diameters. These are independent numeric ranges; do not introduce unsupported formula bindings or assume a fit standard from an example value.