Oh, and as far as changing the calibration goes, I was reading through the zip catalogue the other day and they (and loads of other i expect) sell the different colour coded gears to put in the transmission to true up the speedo. Nice tidy fix, as everythings internal. I'll sometime get round to buying a gear with some more teeth, to slow down my speedo.
Being across the big pond I tend to have to wait until i have a good shopping list (and a good amount of money put aside!) before i get things for the car, as it's not really cost effective to pay for shipping on individual screws. Pain in the backside, but it's good when a nice parcel full of goodies arrives!