...the last one did a 55 sec sleeper !
Never tire of watching tops that behave like that gas cartridge! I call them "gyrophonic" for the whirring sounds they make -- especially on a resonant surface.
By now have made many LEGO versions. The key ingredients appear to be...
(1) Large center of mass (CM) to contact distance relative to top's maximum diameter.
(2) Large TMI/AMI ratio, where TMI = transverse moment of inertia about the tip, and AMI = axial moment of inertia (about spin axis).
(3) Ball tip or equivalent (as in your gas cartridge).
The ball tip (3) is essential -- and within limits, the larger radius of curvature, the better. Properties (1) and (2) generally go hand-in-hand, but not always.
https://www.youtube.com/watch?v=D_btrG34M0Q