For meinenigma it is some things that can be downloaded.
The software or firmware to meinenigma can be found in github: https://github.com/lpaseen/meinEnigma
A paper version of this documentation is included in the kit so you don’t need to download it from here unless a newer version has been created.
You can download it to get a better idea of what you get without buying anything first but to do so you need to be registered.
Documentation – latest version:
Assembly Guide v1.21 – [A4 format] [Letter format]
User Guide v1.0.5 – [A4 format] [Letter format]
MeinEnigma technical drawing/dimensions
MeinEnigma quick reference guide v1.02 – [A4 format] [Letter format]