Oneplus 3 + otterbox case holder

Hello,

Most holders are made to hold bare phone (without any case).
That is why I created holder for my Oneplus 3 with otterbox case.
I mouted it to RAM suction mount that has ball mouting.
Ball adapter can be found here:
http://www.thingiverse.com/thing:499086

Since I use my phone on trackadays with my car, holder needs to be strong and have no play to prevent vibrations.
I printed it with PETG with no supports.

Phone snaps into the holder. No buttons and inputs are blocked.

I