Airlock 6

I created this as a real, physical puzzle using CAD software and my 3D printer.  I was originally going to release this simple digital version of the puzzle so that people could try out the puzzle, since only 1 copy of the actual puzzle was in existence.  Unfortunately I left the puzzle out in the sun too long, and it warped, and was completely ruined.  Now all that remains is this digital artifact, and some photos of the puzzle that never-was-to-be.