3d printable laptop stand

Design a 3D printable minimal vertical clamp stand for MacBook Pro 13" 2019 (304 x 212 x 15.4mm). FORM: Two slim side arms clamp MacBook bottom edge, holding it upright at 90°. Rubber-lined inner grip. MacBook slides in from top. Base plate for desk use (rubber feet). Keyhole slots on back for wall mounting (screw-in, tool-free removal). VENTILATION: Hexagonal honeycomb cutouts on arms and base (≥40% open area). Bottom clearance ≥15mm for airflow. FAN MOUNT: One 40mm fan bay per side arm, M3 4-hole pattern, aimed at MacBook bottom vents. Bays can be left empty or capped with blank plate. STRUCTURE: Min 2.5mm wall. Overhangs ≤45°, no bridges >30mm. 3-part modular: base + left arm + right arm — M4 bolt assembly. PLA+ or PETG. AESTHETICS: Ultra-minimal, clean lines, matte texture, chamfered edges only, no decorative elements. OUTPUT: 3D mesh ready for slicing. Parts color-separated. Exploded + assembled view.