DJI Mavic/Spark Tablet mount base

This is a DYI tablet mount designed to fit into DJI Mavic and Spark remote controller. It requires a ball head with 1/4" screw base, a 1/4"-20 flat top screw with 1/2" length of threaded part and a tablet mount that could be mounted on the standard photographic 1/4" head.
I used https://smile.amazon.com/gp/product/B01M07M9D4 for the ball head and https://smile.amazon.com/gp/product/B00PXC5HU8 for the mount.

Photos show prototype printed from white PLA, the final was printed in black ABS and I choose the white one for better picture contrast.