பம்பரம் 3d மாதிரி

Create ONE single traditional Tamil Indian spinning top (பம்பரம் / Bambaram), using the reference image only for shape inspiration. Do NOT create two objects. Make it rotationally symmetrical, with a rounded bulbous wooden-top body smoothly tapering to a strong pointed spinning tip. Add continuous helical grooves around the body specifically for winding thread, not decorative horizontal rings. Grooves should be ~2–3 mm wide and 1.5–2 mm deep, smooth and easy for thread to follow. Make the model hollow inside with a clean cavity and uniform 2–2.5 mm wall thickness. No internal supports, ribs, or solid mass. Keep the center axis perfectly straight and the model well balanced for spinning. Make it fully watertight/manifold and FDM 3D-printable. Single part only, no cap, rope, stand, handle, or accessories. Approx. 100 mm tall × 70 mm diameter.