After making several sets of previous HexBox and give them to my friends, I starting to receive feed back that they prefer a bigger one for their gadgets.
And here comes the solution.
As a successor of my original HexBox, this design can be extended as you preferred. (As you can see in my photos, originally I have only 4, then becomes 6 and finally 10 boxes now)
As a value add, rather than putting them on the shelves, I design a WallHang part so that you can even hang them on the wall!