Underwater Airlock

My very first complex(ish) redstone creation - an automated airlock for passing from underwater bases into the ocean and vice-versa.

Features include:

• Three airlock cycle buttons - one on the dry wall of the airlock, one within the chamber, and one on the ocean wall.
  
• Safety cut-offs for the buttons, so as to avoid confusing the circuits mid-cycle.
  
• Timers to ensure that the doors don't open too soon and flood your base!
  

Installation:

The MCEdit schematic is set up so that you can simply drop the airlock into a flat wall of your underwater base and load it straight up, no setup required! The glass wall around the airlock is meant as a guide for placement - should you need to alter this to fit your own base, make sure that you add water blocks to the outside areas, otherwise you'll end up with an ugly air pocket around the base wall!

The overall size of the schematic is 14L x 14W x 29H, with 19 blocks of the height being the floor level down, so make sure that you don't have anything important below ground level before you import this into your maps!

Any ideas for improving the airlock, just drop me a comment!

Cheers,

ChunkeeMunkee.