CustomFit3D: Cup holder adapters sized to your exact car + tumbler

Hey PH 👋 Maker here. I kept seeing the same complaint in 3D printing communities — people printing a "universal" cup holder adapter and it either wobbles or doesn't fit their tumbler at all, because every car and every tumbler brand is a slightly different diameter. So instead of one fixed model, CustomFit3D actually solves for YOUR exact combo — you measure your cup holder + tumbler, preview it in 3D, and it generates a parametric adapter (real OpenSCAD geometry, not an AI mesh) sized specifically for your setup. There's a free fit-test print so you can verify before paying for the final files. Would love feedback, especially from anyone who's dealt with this exact "close but not quite" fit problem. Happy to answer anything about how the tolerancing/generation logic works.