I have a clunk in my dual mass flywheel on my 2005 mk4 tdi. I have been debating on single mass vs dual mass as a replacement. I really want to put a single mass on it because of the reduced cost and increased simplicity (aka... never have to replace it again), however there seems to be alot indicating that the dual mass is a vibration dampener as well as making clutch engagement softer. I have heard many claims that going to a single mass on a driveline designed for a dual mass can cause accelerated vibrational wear, especially to the transmission. Is everyone in agreement with this? Has anybody here gone single mass on a PD TDI and observed several hundred thousand miles of service with one? If so... what say you?