Objective: Make a spinning top. This is the 4th iteration in this series of brass tops. It has an inlaid cermic ball at the tip to reduce friction during spin. This top is not your typical trying-to-spin-forever kind of top. V4 is heavy and dense. You might get ~1-2 minutes of spin with some practice. We like to use it as a 1 minute timer for short activities in our house. V4 ships in a giftable 3D-printed case. The case is gridfinity compatible and doubles as a display stand.