desktop brush organizer 3d model

Create a functional, 3D-printable desktop brush organizer based on the reference image. Design a premium dental laboratory ceramic/porcelain brush holder with a rectangular body, rounded corners and a slightly inclined top. Add 18–22 vertical cylindrical holes in different diameters (5, 7, 9 and 12 mm) arranged in 2–3 rows for ceramic brushes and small tools. On the front, create 4 horizontal stepped brush-rest levels with shallow U-shaped grooves so long brushes can be stored horizontally without rolling. Approximate size: 190 mm wide, 85 mm deep, 105 mm high. Use minimum 3 mm wall thickness and a 5 mm flat base. Make the geometry strong, smooth, stable and easy to 3D print without supports. Style should be minimalist, modern, clean and professional, suitable for a premium dental laboratory. Generate only the empty organizer; no brushes, instruments, logos, text or decorations. Watertight, manifold, STL-ready geometry.