Note:  If you want to support my work, do not buy my sets on AliExpress. Most of the sets on AliExpress have not been authorized or licensed by me and are therefore illegal. Instead order the sets on www.lesdiy.com  or www.amazon.com . Just enter the designer name " langemat"  and you will find available brick sets. If you're only looking for the instruction file, you can download the available documents directly from www.rebrickable.com . This is a clockwork, built with diff