RS 250 Lightweight Flywheel.

I think it's more about the lighter feel - people want to upgrade to the SMF (and it's a cheaper part) but don't want the unsprung clutch disc

A friend of mine looked at the 250mm diesel option but thought the fact it would be balanced for the diesel engine could be problematic

I am aiming for around 400lb/ft of torque

By all means do the R&D for us ;-)