Id like to start by saying im in no way affiliated by these guys, or am I trying to sell their products or premote them. ------------------------------------- www.revomaze.co.uk Im a HUGE fan of puzzles. Im always buying little metal die cast ones, and many people get them for me as presents. Ive yet to have a puzzle take longer than 2hrs, and Ive NEVER had one that makes me want to punch little kittens. Saying that, Ive never finished a rubiks cube for some reason. Enter the "REVOMAZE". The Revomaze is a rotary "lock" of sorts which contains 2 main parts. The outer housing, and the maze shaft. The outer housing which is coloured, designates the difficulty of the puzzle. Blue being the easiest, then Green, Bronze, Silver and finally Gold being almost impossible. Click to view full size! The maze shaft has a series of cuts in it which creates a maze or "labyrinth" for you to navigate. The outer housing has a small pin (dowel) which is spring loaded pressing it into the maze. As you twist and pull the maze shaft, you sometimes hear it "click" and you CANT get back to where you were. Much like a trap or a dead end. The only thing you can do is try to follow where the path takes you. You can be quite deep into the maze, hit a trap, and the ONLY thing you can do is push the shaft back in to "reset" it. You must start all over again. Its a very ingenious way of doing it. You know you have completed the maze when you see the 2 dimples line up with each other. There is one on the outer housing, and one on the maze shaft. Soon as you see it, you have successfully completed it. You are then able to "tap" out the dowel pin to reveal the maze. Click to view full size! Once the maze shaft is out, there is another smaller shaft inside. This has a certificate of opening rolled up in it. Each puzzle has a unique serial number. By emailing this serial to the creator, you can request the next puzzle. Along with each cert is a special transparent "clue" to a 6th and (i think) final puzzle. By solving all 5 puzzles, you receive enough information to solve the 6th puzzle, which will be opened, by invitation to a special "competition". Im not sure if the 6th (Purple) puzzle will go on sale after this, or if its mearly "offered" to people who have opened all the previous 5. time will tell. The puzzle is machined via CNC, which you can see below. To watch the creator solving the BLUE puzzle, The Blue took me around 6hrs to complete, the Green im saying ~15hrs. Once you know the way to go, you still have to struggle to some extent to repeat it. Im still having trouble repeating the Green, even though i know where im going. Thats how tricky it is. Anyway, thats about it. Its a great time waster, and the sense of achievement on actually opening it is HUGE. Being the geek that i am, ive already thought about making an Arduino "auto opener". Stepper motor and a servo or something. Spin the shaft around, pull it in / out at the correct spot, bingo.. Auto-opener. Saying that, you must first SOLVE the puzzle so you know where the hell your going. Im going to have it a guess and claim it cant be done via a "learn" method. Someone prepared to prove me wrong ? Im happy to try and answer any questions i can about it, but obviously WONT provide pictures of the actual maze, so dont bother asking.