Why buy a ball for one condition, and change the coverstock to bowl on another condition? Buy a hook monster oil ball and polish is it to bowl on a THS. Or buy a weak ball and dull it up to bowl on more oil. I can understand tweaking a particular ball for the condition it was meant for, but why the major changes for a ball not meant for the conditions it was meant for. I.E a bowler i know bought a Infinite One and polished it to the point it was a Whirlwind! Just curious?