Dove Tail magic box

I redesigned the original design in Tinkercad.
I made it into a box with some space to hide something (like money as a gift)
I also designed it for a 9.6 mm ball and a 6mm by 3mm high round magnet that I could buy at my local office supply store (white board magnet).
The dimensional tolerances are critical, I had to sand a bit to make parts fit together smoothly.
Maybe I update the design later.
Let me know your experience when you print this design.
Also have a look at the original design