Armrest mount for RC controller on Extreme X8 wheelchair

Have only one hand working, i need something to hold my rc controller while i drive the power wheelchair or fly my DJI Mavic 3 drone.
I use a quick release adapter from Thor's Droneworld (Quick Release mounting bracket from www.thorsdroneworld.com)
This can be used for a camera or other equipment too.

I printed this in PLA, but considers to print in PETG also to handle cold weather and moist outside.