Hello everyone, thank you for your interest. You can find a detailed documentation on https://firstreview.de/diy-e-gitarre-3d-drucken/
I ordered the Harley Benton TE-20 SB Standard Series electric guitar (https://www.thomann.de/de/harley_benton_hbt16sb.htm?offid=1&affid=1321).
Guitar strings: If you also start from the Harley Benton guitar, order new strings at the same time, then the guitar will sound much better and you will have less stress when mounting it. In my case, they were Daddario EXL120-3D.
The author marked this model as their own original creation.