I posted some information about the development and the build of the mechanical brake in the project log of the Nerdiskerator. Because it's also one of the main security features of winDIY i think its worth mentioning here. (I do not want to post the same content in two project logs) You can find the full log here: https://hackaday.io/project/172445/log/182044-brake-actuator-next-try

Here is some (teaser) content: :)