This is a very difficult puzzle to do, the design was left to me by my grandfather. He made a wooden version of it as an apprentice piece some hundred and twenty years ago. Until recently it has not been viable to reproduce it and this was only made possible via 3D printing. If you can dismantle it and re-assemble it after mixing up the pieces you will be one of the very few. We have seen similar puzzles at craft fairs but they are not the same as this one. We have searched the net and nothing identical has been found. this will give you many hours (days) of entertainment.