The Old republic puzzle box, which can be opened by discovering first the cover, then the "force" (which is a cut nail) and at the very end the use of centrifugal force.
Not so easy to discover how to open it for people who do not 3D print it ;-)
It is so cool to see how friends are different when they tried to open the box.
Note: the part 4 is huge (90mb) and not displayed here but no worry, these parts are included in the zip file you will download.
2 nails inside the box and 4 nails outside.
4 nails are needed: 3 nails, which are called lockers and one nail called the "Force".
Once opened, the box hides a secret: the head of Darth Vader (The great one modelized by csl0304.(https://www.thingiverse.com/thing:1191485)
The 2 nails inside:
10 mm of length with a diameter of 2.30 mm.
The other 4 nails
a - A big one: 50 mm of length with a diameter of 2.55mm.
b - Two middle nails: 30 mm of length with a diameter of 2.55 mm each.
c - The last nail is the one called: the "Force": 35 mm of length with a diameter of 2.30.
Open the PDF document and 2D print the text. Cut each strip of text and put each of them as shown on the pictures.
Once you have cut all the nails, follow the instructions :
1 - Put the first inside nail (10 mm length) in place (left side or right side, start with the one you prefer).
2 - Put some strong glue on one of the little part 2.
3 - Put the little part on top (covering the nail inside)
4 - Repeat the steps 1,2 and 3 for the next side.
5 - Ensure, once glued, the nails inside can move freely.
6 - Push the nails inside the previous assembled part and then put the part 3 on top of it.
7- Put now, the part 4 (the big ornament part with the old republic logo) on top of the part 3. DO NOT USE FORCE, if the part 4 does not enter correctly on the top of the part 3 then rotate the part 4 and it will fit better.
8 - Shake all and at this step, the nails will enter in the box so the puzzle box is now closed.
9 - To add more difficulties, put the 4 nails where they have to be, as shown on the pictures.
8 - To open the box, get out all the outside nails with the "force" and finally use the centrifugal force by twist/rotate the entire box on a table for instance to open it.
Get out the Darth Vader head: this is the gift of the box.
Done. Enjoy :-)