As a econometrician/statistician I am always looking at data to see patterns and relationships. With a large collection of metal tops I have lots of data to play with. Below is a plot of the longest recorded spin time for each top in minutes against the weight of the tops in grams. Tops are grouped in categories: tungsten tops, tops made with CNC machines (they use a different assembly method to tops made on manual lathes generally), Big tops over 1.5″ diameter, coins or stemless tops, and all other tops (called Std in the graph).
Below is a plot of the same tops but the vertical axis reports the Zen Ratio for each top. The Zen Ratio, named for Marc Osgood of Zen Spinning Tops who conceived it, is the ratio of the spin time to the weight, and is a measure of performance. I have only one top in my collection with a Zen ratio greater than one — and it happens to be a top made by Marc called the 1:1. He made the top to achieve a Zen ratio of at least 1.0. He did that and some!