I just got my "Baseus" phone holder for my car but i didnt want to mount it with the vent-clip they provided. Instead i bought a Brodit pro-clip for my car. In order to mount the Baseus holder to the pro-clip, i created this.

The big one has a base-plate measure of 5X7cm. Now updated (Dont mind the name), thicker cone shaped base for the ball for better strength.
The smaller one measures 5X4Cm.
The ball itself measures 17,2 mm in diameter if anyone whish to use it for something else.
The screw-holes in both versions are 3mm in diameter.

The big one took just over an hour to print with 0.6 nozzle, 50mm/sec speed and 50% infill.
I used carbon fiber filament, but ive also done one in petg. I recommend to use much infill, especially if youre using PLA.

No supports needed.

Creality

Ender 3

No

No

0.20

Around 50