i saw a nice Kryptex http://www.thingiverse.com/thing:619853 but you have to glue the case. No, I don't like the final situation. no maintenance possible.
my Kryptex is full programmable only when its open. You can change the Code how often you want.
I hope you have fun with it.
Please print with support.
Rotate 180 degrees in X) to print it as I thought it might print better with the teeth upwards
If you warm the parts with a hot air gun then your pressure inaccuracies will disappear.
Simply heat both rows of teeth (only lightly) then press on a table. Both must be flush only then fit all the rings.
You have to open the kryptex and you can use one ore two screwdrivers to retract the spring.
Dimensions:70mm x 95mm outside and 37mm x75mm inside.
=== Edit: 2016-05-27 ===
add "Aussenring_2.STL" and "Innenring_V2.STL" for more space