My clutch and dual mass flywheel failed, I replaced with light weight single piece flywheel (added cost about $100) and used the stock solid clutch disc from the stock clutch replacement kit. I opted not to spend the $650 for a sping loaded clutch disc. I read about problems such as grabby engagement (with no spring in the clutch disc to replace the spring in the DMF) and rattling noises. Long and short, its in, it works great, and is noticably quicker with no loss in streetability. Its like a new car. I track the car a lot, I can't wait until spring.

 

Did you have the LWFW balanced before you installed or did you just put it in? I have read about issues with the vibration and harmonic imbalance impacting the long term health of the crankshaft (read, stressed or broken crankshaft).