Took it to Goldmsiths , last serviced April 2010 , so no guarantee there !
£440 is the estimate to replace the crown , so don't overtighten yours !
So now i have had a expensive few weeks just repairing stuff , Rear door lock/window problem ED30 £350 , New Battery £75 , New freezer £700 , New shed (Tree fell on it) £800 and wife had her eyes repaired £4000 (Lens replacement)