New number

 

James posted, "Wouldn't 4 be a more appropriate number in that livery? Then you could use it for Thunderbird services."

And after a day with this floating around the back of my mind, I couldn't resist. Off came the vinyl number 8, and a 4 from the same pack went on. 

I seriously considered a read line around the edge of the battery boxes, but decided this was a step too far. If you get the joke, you get the joke...