Hi all, it was done at the dealer. Apparently MMC sent out a notification to dealers with the updated file. All done as a warranty job so nothing to pay. Not sure the dealer liked it and would have preferred doing it with a service but I do most of my own work so didn't want to wait.
It seems livelier up through the box at the low to mid range, top end doesn't seem any different.
It's an improvement overall I think.
