Twitchy tacho.

[simonknee]

Oh and if your steering column is like mine it'll be in the way when you try and remove the tach or speedo. Remove the cowling for the stalks and then loosen the two nuts on the U bracket just behind the dash. This may provide enough give for the intsruments to ease out or you may need to loosen the column lower down as well. The steering wheel can stay on if you like.