High-Spin Fusion 360 File - PLA Top Design

I’m looking for a designer who can squeeze the very last second of rotation out of a fully-printed PLA spinning top while keeping it under 20 g. My only hard requirement is that the top must spin for at least 30 seconds on a 150 mm concave glass plate straight off the printer—no sanding, filing, or post-processing of the tip allowed, and absolutely no embedded weights or foreign materials. Standard FFF settings only.

Priority
My single biggest goal is maximum spin time. A stable, elegant look is a bonus, but every geometry decision should serve endurance first.

Shape & tip direction
I’m leaning toward a cone-shaped profile because it should concentrate mass low and central. For the tip, I don’t want an extreme needle nor a flat puck; instead, explore an in-between radius you believe will give the best balance of low friction and minimal wobble.

What I need from you
• A production-ready CAD file ( Fusion 360) and a clean STL.
• Recommended FFF settings that you actually used in simulation or testing (layer height, infill, wall count, etc.).
• A brief rationale for how the mass distribution and tip geometry achieve the 30 s spin target.
• Confirmation that the design prints in PLA at ≤ 20 g without supports that touch the tip surface.

Acceptance test
I will print your model on a ONECORE+ using generic PLA and the settings you provide. If the top exceeds 30 seconds of continuous rotation on my concave glass plate, the job is done.

If you have previous experience with precision tops, gyroscopes, or mass-efficient CAD (SolidWorks, Fusion 360, Onshape), please mention it. Looking forward to seeing how you push PLA physics to its limit.