And of course, I built it with Build123d and the source code is available on @MakerRepo: makerrepo.com/r/fangpenlin/o…

Woot! 🎉 TinyRack.io 1.2.2 just released! I also added an assembly artifact to show how everything put together 😄👍

I took one of my most popular CAD models on MakerWorld, an IKEA-style cam lock redesigned to make it 3D-printable. It was originally built in Fusion 360. I then tried converting it to Build123d while keeping the model exactly the same. Here are a few things I learned: If you export a STEP file and ask an LLM to generate the model from scratch, it will probably output 💩. In the end, generic LLM models still aren't very good with geometric reasoning. Instead of doing it in one big step, I broke down my Fusion 360 operations into smaller STEP files. Each STEP file only contained one critical CAD operation from the previous one. In the LLM prompt, I would then reference the STEP file and suggest what kind of operations it could use to achieve the next step. Most of the time, this worked well. However, I still had to step in occasionally to fix things manually or write much more detailed instructions. At some point, it might still be faster to do it myself. The great thing about using LLMs is that they’re excellent at extracting tricky parts, such as spline control points or complex shape profiles for extrusion. Next time, I’ll probably let the LLM handle only those difficult sections and take care of the rest myself.