Puzzle lock for geocache

A riddle lock for a geocache. A small ball is hidden in the upper part of the object. You have to sink blindly this ball into a hidden hole. Then you can left the bolt and remove the PET can with the logbook.

A 8mm metal ball is required.

Details about the assembly can be found in the assembly instructions

1) print the bold with support. Do not use a support for the hole in the middle
2) Put a 8mm metal ball in the hole in the middle.
3) print the case up to a height of 41mm. Insert the bold with the ball in the case (check the opening at the front is correct)
4) finish printing the case