Travel Math Puzzle

This is another instalment of my “Travel-games”.

The previously published remix of the math puzzle now in a travel box and with different, simpler, numbers. (Thanks to lorenzo @lorenzo_540536 ).

This game is easily transportable and can be played in a car, train or plane while traveling.
You can take the real puzzle out the box and put it back in to retain your last setting.

The goal is to have the same total of the numbers on each and all the spokes. 
For example we could have on one spoke the sum 5+3+12= 20, on another: 6+12+2=20.
I liked the idea and how Lorenzo had implemented it.
It is great for children to learn addition.

I printed the puzzle with 0.2 mm structural layer height and a color change to make the numbers visible.

To make it colourful I used white as base for all rings, but different top colours. In this way the numbers show white. Of course when you use black as base the numbers will then be black etc.
The 3mf files have the color change.

The screw is a standard M5 x 10 mm screw with an inside hex head. For the nut use a self locking one. You can also use Loctite to secure a standard nut. 
Other types of M5 fasteners should also work.

The lid of the box has been designed in such way that it is easily taken off, this is also a consequence to have a nice simple box without hinges sticking out. The size of the box is the same as all my Travel-Games.

I printed the parts of the box with 0.2 mm layer in PLA. The smaller parts, clamp with 0.1 mm layer.

It is best to glue the clamp to the lid. The studs are not that strong.

You can use pieces of filament for the hinge. Probably you have to ream the holes with a 1.8 mm drill and the holes of the puzzle with a 5 mm drill.