4 digit kryptex

This is a 4 digit kryptex that I made. that you can program your self.
you need:
1X inner tube
1X outer tube
1X cap or alt cap
4X code rings
4Xnumber rings or blank rings

UPDATE!!!!! 10-9-20
- I can't believe I did not notice until now that the outer tube was not completely cut through.
- I am very sorry for anyone who tried to print it and it is now fixed..