Sure, I'd be happy to help you get started with 3D printing! I'll break it down into a few steps, from learning the basics of 3D modeling to printing your first custom part.

Learn the basics of 3D modeling:

To start, it's important to get familiar with 3D modeling software. Two popular free options are Tinkercad and Blender.

Tinkercad (Beginner-friendly): Tinkercad is a browser-based, user-friendly CAD software that helps you create 3D models easily. It's perfect for beginners. Tinkercad tutorial: https://www.tinkercad.com/learn/designs

Blender (Advanced): Blender is an open-source 3D modeling software with a steeper learning curve but offers more advanced features. Blender tutorial: https://www.youtube.com/playlist?list=PLa1F2ddGya_-UvuAqHAks...

Understand 3D printing basics: Learn about 3D printing technologies, materials, and the process. This will help you make better decisions when designing your parts.

3D Printing basics: https://www.3dhubs.com/guides/3d-printing/

Choose a 3D printer:

When you're ready to buy a 3D printer, consider factors like build volume, material compatibility, and price. A few popular entry-level 3D printers include:

Creality Ender 3: https://www.creality.com/goods-detail/ender-3-3d-printer Prusa i3 MK3S: https://www.prusa3d.com/original-prusa-i3-mk3s

Learn to prepare models for printing:

Once you've designed your 3D model, you'll need to prepare it for printing using slicer software. This software converts your model into instructions for the 3D printer. Popular slicer software includes:

Ultimaker Cura: https://ultimaker.com/software/ultimaker-cura PrusaSlicer: https://www.prusa3d.com/prusaslicer/

Print your first project:

Start with something simple to familiarize yourself with the 3D printing process. Then, move on to more complex projects like your custom Magic Trackpad support.

Join online communities:

Participate in online forums and communities to get advice, feedback, and inspiration. A few popular 3D printing communities include:

r/3Dprinting subreddit: https://www.reddit.com/r/3Dprinting/ Thingiverse: https://www.thingiverse.com/

Follow these steps, practice regularly, and you'll be well on your way to becoming a 3D printing hero. Good luck!

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Or maybe it's just really undeterministic. :)