thanks for "Calin Mihai Cioci" from UK, the 3D stl file design by him. more details about his KC868-A4 project, see this link:
http://calincioci.uk/kinconya4/
3D print files for Base:
https://www.kincony.com/images/KC868-A4/...ase_A4.stl
https://www.kincony.com/images/KC868-A4/...se_A4.step
http://calincioci.uk/kinconya4/
3D print files for Base:
https://www.kincony.com/images/KC868-A4/...ase_A4.stl
https://www.kincony.com/images/KC868-A4/...se_A4.step