Fan Enclosure with Snap-Fit Lid

Create a handheld rectangular electronics enclosure for a small fan project powered by AA batteries. External size: 140 mm long, 70 mm wide, 45 mm tall. Internal cavity: 130 mm by 60 mm by 35 mm to hold a small DC motor with propeller, a large round push button, wiring, and a 4xAA battery holder. Wall thickness: 2.5 mm. Add a removable top lid that uses snap‑fit clips instead of screws: create four internal snap tabs on the lid that flex and latch onto matching ledges on the side walls. Tabs should be about 2 mm thick and 8 mm long, placed near each corner. On the front of the lid, add one large round push button opening: 20 mm diameter, centered left‑to‑right, 20 mm from the front edge. On the front wall near the top edge, add a circular opening for the small DC motor shaft and propeller: a 10 mm diameter round hole centered horizontally, 10 mm down from the top edge, with enough clearance so the propeller can spin outside the box. Inside the enclosure, reserve a compartment for a standard 4xAA battery holder: 60 mm long, 55 mm wide, and 15 mm tall, located along the rear side of the floor, with 2 mm clearance around it. Leave the remaining internal floor area free for the motor, button, and wiring, with gentle internal corner fillets so wires do not snag. On one side wall, add a small 6 mm round hole for a power cable or switch lead to pass through, centered vertically and 30 mm from the back edge. Slightly round all external edges so it is comfortable to hold and easy to print. The model must be watertight and suitable for FDM 3D printing, with no non‑manifold edges, and the snap‑fit lid should be printable in PLA

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