I have been trying to figure out what makes a good cryptex. For those of you that do not know search google. Justin N (www.cryptex.org)pretty much has the best one out there, but I have no idea of what makes it so good. Is there anybody out there willing to help me make one? I have the machines to do it. Just not the knowledge. If you go to his site make sure you go to the handcrafted one for a few more pictures of the inside.
I know how to make the simple keyway style ones shown in the scrollsaw magazine.
A cryptex is a combination lock with letters instead of numbers on it. As such, I'm sure you can work out what the desirable properties and features are: The ability to set your own combination, features that make the lock difficult to pick or break, the tactile quality of the action, and quantity of internal space. After that, you've got the obvious issues of craftsmanship and finish.
Since a cryptex is a decorative or toy item, the finish and action are going to be the most important -- security isn't really a big issue.
I still need some other options as to how to put it together.
What sort of information are you looking for? The ones on Justin N's site look like they could just be using a keyway design with a spine on the plunger/insert. It's a bunch of care and work to get things right, but I wouldn't expect there to be anything particularly complicated.