I just got both of these balls and had a few questions. I saw that the Silvers coverstock says it is a reactive urethane, is that true? How different from a reactive resin is that. How will it compare to my Uranium Pearl? I was also wondering if my Tsunami is a solid? I was hoping it would be good on heavy oil, should I change the coverstock? It is sanded to 600 grit and polished right now. It also has a unusual drilling, pin is under middle finger and diamond logo is in slightly to the right of the palm, what will that make it due? I have thrown it once and it seems very controlable. Any info on any of these questions would be greatly appreciated.