"As for the lightweight flywheel, it's a great thing if you know what you're getting into. Your starts will be quick, but the stress on the drive shaft is increased so you need a clutch plate with springs to absorb some of the stress the dual mass flywheel used to absorb. Also, when you're driving slowly in traffic, you will jerk around a good bit so be ready for it. Personally, after researching the lightweights, I'd only look at flywheel replacement if the old one is bad."
Thanks for the feedback John, that is just the sort of thing I was wondering about.
Ed