I like that the creator is giving the STL away for free
> I know there are other dogs and owners out there facing similar struggles. That’s why I’m sharing this design for free. While it’s not adjustable by design, it should fit medium-to-large dogs as is. If needed, measurements can be adjusted using the scaling feature in your slicer software, but some slots, like those for the straps, might deform in the process.
Only missing for it to be a parametric design people could easily adjust based on their own measurements, but trivial to change yourself too, so again, lots of thanks to the author for improving the whole world, not just a tiny piece of it.
It's been a really harsh and long process to CAD this model, it's also really complex to change measurements for it.
As I do wish to have a simpler version for customizing, for now by taking people orders I might either build a new parametric model, or have a growing "bank" of models and measurements to share for free like the main version.