It's interesting to see us all go through the same thought process... I was wondering about solid flywheels too but the stories about smashed gearboxes and even more worryingly broken crankshafts scared me too much. No choice for me now because I've got most of the parts (dual mass etc)- just need the new flywheel bolts and for it to stop snowing/raining/freezing etc so that I can get to work on the driveway. Fiddy, don't even mention injectors / fuel pumps! So far so good. I'd rather fix the flywheel twice!