semicircular card plate 3d model

Create a precise, dimensionally controlled, professional CAD model of a LOW-PROFILE SEMICIRCULAR CARD PLATE designed for FDM 3D printing. This is a functional product design, not a decorative 3D model. The design must be based on the following exact concept: A single flat semicircular plate with exactly FOUR recessed card positions arranged on its upper surface. The cards lie FLAT inside the plate. The plate itself is the main object. Do NOT create a vertical card holder. Do NOT create a card rack. Do NOT create tall walls. Do NOT create individual standing compartments. Do NOT create a circular tray. Do NOT create a rectangular tray. Do NOT create multiple radial slots. Do NOT add extra card positions. The final object must look like a clean, premium, minimalist semicircular plate with four precisely positioned rectangular recessed areas for cards. ============================================================ 1. CARD DIMENSIONS ==================================================