How does adding perimeter lead or tungsten tape alter paddle swing weight and twist weight?

Custom paddle customization relies on physics. Adding high-density tungsten adhesive tape along the side rails (3 and 9 o'clock) increases the paddle's polar moment of inertia (twist weight), widening the sweet spot and stabilizing off-center mis-hits. Adding weight to the top (12 o'clock) increases swing weight, turning the paddle into a hammer for baseline drives at the expense of kitchen hand speed.