i was looking around on the internet for parts for the tc and i came across NST's lightweight crank pulley. the price is right at about $100, and the install isn't too difficult, so my question is this: has anyone had any bad experiences with lightened pulleys? i've heard things on other forums about how you can spin a bearing due to the lighter mass, but i'm skeptical due to the huge amount of lightweight flywheel discussion on this forum. and in case you're wondering, i've searched on this forum and came up with nothing but smaller pulleys for superchargers. thanks in advance for any info.