thats what i was thinking that i would prefer to stay with stock. just wasn't sure if it would work ok when matched upto the new JWT clutch. I would prefer to save the £400 on the flywheel aswell as iv'e got to pay for all my engine to be balanced and various other bits. CZP sells one but it appears to be the model below what you suggested megadan and i'd like to get the best one possible so im leaning towards the JWT severe duty.
I use a GFB Lightweight crank pulley that has no harmonic damper aswell and i believe the heavier flywheel aids in that department so thats another plus to keeping the stock flywheel