Interpretation of STL file very different

Hi there, I have spent quite some time to design this friisbee model and wanted to get it to a 3D print service. The upload of the file then showed a strange outcome. Can you help. I am a bit concerned.image

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If you open it in different viewer, is it OK?

You can experiment with adjusting the STL export quality.

István, it has nothing to do with the resolution quality. I don‘t have a different viewer. I can send you the file Shapr3D file for you to repeat.

I tested medium quality which provides a correct form but which is far too rough and high quality which creates this awkward erroneous form.

Yes : Could you please send the file to support@shapr3d.com so we can check it?

Thank you really much!