enclosure lid 3d model

Generate two separate 3D printable models: a top lid and a bottom body. Use only pure mechanical geometry, no semantic labels. Assembled dimensions: width 180mm, depth 100mm, total height 45mm. Wall thickness 3.5mm, top lid thickness 4mm, edges slightly rounded, minimal industrial style. Top lid is a flat plate 180x100x4mm with 6 circular holes Ø30.5mm arranged in two rows of three, evenly spaced and centered, plus 2 circular holes Ø7.2mm centered above. Include 4 corner screw holes with through diameter Ø3.2mm and countersink Ø6.2mm depth 2mm. Bottom body outer size 180x100x41mm with inner hollow height 38mm and flat bottom. Include 4 internal posts aligned with lid screws, post diameter Ø7mm, height 6mm, center hole Ø3mm. Include 4 additional internal posts for a rectangular PCB, same size, arranged in 65x40mm. Add one lateral rectangular opening 12x8mm centered vertically. Clean manifold geometry, watertight solids, no decorative elements, fully suitable for FDM printing.