How did it not “hold up” did the friction surface wear out? What was the driving in the 2500 miles?I had the Fidanza flywheel and Fidanza clutch in my Elise. I like the quick free reving for heel and toe shifting but with just over 300whp it did not hold up. After 2500 miles I swapped for a MWR steel flywheel that is only slightly heavier but should be much more durable. If the Fidanza is almost 8 pounds the MWR is only half a pound more weight.