Kits have been appearing which allow variators to be 'reconditioned' to (hopefully) eliminate the 'death rattle' on start up. These appear to be official Alfa Romeo items and rumour has it they were supplied to dealers to deal with complaints under guarantee! Please could someone advise how to change the parts over and how much of a problem this is.........detailed d.i.y. instructions would be more than welcome. Thank you.

