[Pernod]

Hmmm, last car I did it on, I actually told them before they had a chance to ask...

"'You'll notice that I've changed the dash a bit - I did that when I got it XX years ago. It was realy just an excuse to take the dash off so I could check that the odometer hadn't been tampered with, which it hadn't"

It worked two, them seemed impressed that I had been so through when I had first brought it (as they would have had no idea how to get the dash off, yet along thought about checking the odometer!