Well...
...apart from the letraset for the box lid that is.
The box now has instructions in a little velvet pouch, two spare 'power cartridges', a warranty tag on the weapon ( it reads "warranty void if fired") and a little label on the front of the box, that reads "right handed version".
And one other change to the gun - spot the difference...
Yes - the gun now faces the other way in the box, because I moved the gauge from left to right. Why did I go to all this effort you ask?
Because I found an old leather holster at an antique fair that fits the gun perfectly! Only thing - with the gauge to the left, the holster had to be worn to the left, and the grip is right handed.
So I changed things so it can be worn to the right.
I reckon that his project is well and truly done. I will still look for a way to put a label on the lid, and Letraset looks like it might work Robo.
Meanwhile - back in the lab...