I may still go Ali fw.
Seems to give a noticeable improvement in responsiveness and makes the car lighter on its feet..
I do very little sitting still idling - the time when you hear chatter. By dipping the clutch the rattle goes away anyway. There is still chatter on the steel SMFW but not so bad..
Here is a car with spec stage 3 and Ali fw. I contacted him for feedback he has put 40,000 miles on this setup and loves it - I think he also has RBs
Car: 2010 Jaguar XFR (Cat-back exhaust)
Gone but not forgotten: Highly Modified E90 335i LCI M Sport Manual (circa 480BHP/500lb ft)