There is OpenSCAD code for 2 different versions of this model: one with chamfer (requires Chamfers-for-OpenSCAD library) and one without. It looks and prints bettter with.

The model is fully configurable. You can change:

• The number of cables ducts (default: 8)
• The width of the cable ducts (default: 5mm)
• The spacing beteween cable ducts (default: 12mm)