Excellent top from one top builder to another. As you know, a very long-spinning top can be had by adding nothing more than a tip and a stem to a 10x10 dish. Your skeleton attachment is a wonderful form-fitting cosmetic touch. Guessing that placing the skeleton above rather than below the dish would increase run time by lowering the top's center of mass, but the only way to know for sure is to try.
There are a couple of things you need to correct to qualify. First of all, the launcher does not count to the parts total. Only the top itself does. This means your top only has 15 pieces and should be in the light category and not the medium one as it currently stands. Also you need to clearly show it spinning and none of these pics does that. If you fix these items you'll have a fine competitor for the game.