You know, if you're going to use someone else's designs to promote your for-pay work, the least you can do is actually link to the designer who created it. And the project for which it was created.

https://steemit.com/utopian-io/@lextenebris/3d-design-steempi-full-case-redesign

I recognize that intellectual property law is somewhat different in Austria, but it is signatory to multiple copyright conventions and the various requirements of the European Union. They tend to be – stringent.

I'm sure you meant no infringement by failing to credit either @Techtek or myself when you decided to self promote using our work, right? Because that would be unethical and raise questions about your trustworthiness as a 3D print provider.

Or as Wikipedia might put it, "citation needed."