Booking for the laser cutting take me more than a week. I prepare to do the cutting even three weeks ago. And I was hestiate to do that.
There is a accident happening in the cutting. After I finshed the cutting I went to wood workshop. The tech here said to me that is not fit. One of the side should be cut out for the 2mm conncecting side. She said I should go back to the laser cut or cut from the machine in wood workshop. She mentioned to cut 2 side of the board, but I argue that I can cut one side in the small side of the board. Sadlly, I cacluated wrong. I can cut from one side from this square, but I should cut 4mm instead of 2mm, becaue it is the connecting side for two side.
In the end, the solution is to every side conncet 1mm with glue and leave 1mm without the glue. Some of the box is connect 2mm and wider a bit so conncet the top square inside.
It is not perfectly and not that stable. The water and sand are all leaking. I should learn this experiences.