Talking of gauges...
A perfect fit.
Cut it out
Removed the gauges
Placed the overlay onto the face
Tadaaah! All without removing the needle. You can't even see the slit.
Haven't got any photos inside the car yet as it was too dark. Will get some tomorrow!
With red, it's hard as the numbers are already black. The only thing I can do is add some sort of dropped stroke to that they ping out:
