Cryptex!

Very cool idea (not mine it was posted as a competition idea by Everythingmechanical http://blog.makezine.com/archive/2010/04/makerbot_giveaway.html)

Seemed easy enough to make a simple one so here it is.

2 part inner tube 2 part outer tube and a tumbler (you need 5 to complete assembly)

I've included the SKP file for those interested.

I'm still very new to 3d modeling and sketchup (learned a lot this past couple of weeks tho) so my images are still pretty ordinary.

If I get the