Print using PETG, ABS, Carbon Fiber, or ASA. I used ColorFabb XT-CF20 - .2mm at 50% infill. I have had this in my car for over a year and no issues with warping. Use supports for the Phone cap and the MINI Cap. The phone mount was made for a Pixel 3, but still works with my Galaxy S21 with the case. The caps are in standard PLA and still no problems - but if you have intense sun or heat, consider using PETG or ASA.
The author marked this model as their own original creation.