I have just bought an installed a VXR set of clocks in my Vec C. Now that i have tested to make sure they work correctly (which they do), i need to get the milage altered to the same as my original clocks.

Can anyone recommend a place where i can get the milage corrected to what it should be? The tinterweb shows loads of places which can do this, but would much rather use a reputable company rather than a back street jobbie.