@Grant-1
Here're some guidance on creating your own 3D models for printing:

Using AI Function of the App:
Once you have bound your machine with the app, you can directly use the AI function to create your own models.

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2. Downloading Files from Websites:

You can download your favorite files from websites like: Thingiverse Cults3D Free3D After downloading, you can either upload them to the app for printing or use computer software like Wiibuilder to slice and prepare them for printing. Here is a tutorial for Wiibuilder: Wiibuilder Tutorial Learning to Use Professional Modeling Software:
Depending on your preference and the complexity of the models you want to create, you can use professional modeling software to export STL files for printing. Here are some options: Desktop Software: Blender SketchUp 3DMax Web-based Software: Tinkercad Mobile Apps: SketchUp (Mobile) Tinkercad (Mobile)