My car is booked to go back to the factory for a bevel gearbox warranty change in March, arranged some time ago. I recently asked if the NVH mount could be done at the same time as the box change and assumed that it would be cheaper than the £474 (inc. VAT and fitting) that was quoted, as the box had to come out anyway. The reply I got was that the NVH mount change was made no easier by the BB change and it was a fixed price. I have no idea yet what this modification looks like or what is involved with the change. Someone mentioned engine and gearbox removal but I find that hard to believe. I hope they have a spare BB in stock by March!