Compact Combo Lock (Keypad GUI)

When I say compact, I don't mean small, but it's very compact for what it does. The dimensions are 14W x 23L x 10H where length L (23) is the front of the device. All the parts are labelled with signs so you can move, add and remove sections as you wish.
The concept is that you have to press each of the nine buttons in the right order, then the 'enter' button in order to emit a signal (which stays on via memory cell). I'm using it in my adventure map to open a door, but you could just as well have an overkill light switch in your over sized house.
The original idea came from AntVenom in his video "The Redstone Experiment : Compact Combination Locks" but he only released it as a world download, with some of it underground, half made on dirt and already specialized to open a little iron cell.
This is probably what everyone actually wanted, which is a neatened, even more compact, non-specialised .schematic file for MCEdit which is built from scratch with reference to the original.

Enjoy!