Bingoboard

I have printed this on a Raise3D Pro2 printer, using the speed setting and without any raft or support. Printed in PLA.

To make one board you need to print the bottom, the top, and 25 lids.
I did include one sample pdf board. If printed in A4 it should fit the board.
That pdf is made from the Bingo Machine program that I have published for android. To find it just make a search for Bingo 75 or amy66dev at google play. The program is free, and have no ads. Use it to create your own boards and export them into printable pdf files.

The pins on the bottom will fit tight into the holes in the top part, which will make the parts stick well together.
But if you need to disassemble the board, these pins might break if you are not careful.
I found that the best way to avoid breaking the pins is to put the board on a flat surface, then use a small screwdriver and press and hold the pin down while using another thin screwdriver (or your nails) to separate the top around each of the hol